article.xml revision 301631
1<?xml version="1.0" encoding="iso-8859-1"?>
2<!DOCTYPE article PUBLIC "-//FreeBSD//DTD DocBook XML V5.0-Based Extension//EN"
3	"../../../share/xml/freebsd50.dtd" [
4<!ENTITY % release PUBLIC "-//FreeBSD//ENTITIES Release Specification//EN" "release.ent">
5 %release;
6<!ENTITY % sponsor PUBLIC "-//FreeBSD//ENTITIES Sponsor Specification//EN" "sponsor.ent">
7 %sponsor;
8<!ENTITY % vendor PUBLIC "-//FreeBSD//ENTITIES Vendor Specification//EN" "vendor.ent">
9 %vendor;
10<!ENTITY security SYSTEM "../../share/xml/security.xml">
11<!ENTITY errata SYSTEM "../../share/xml/errata.xml">
12]>
13<article xmlns="http://docbook.org/ns/docbook"
14  xmlns:xlink="http://www.w3.org/1999/xlink" version="5.0">
15
16  <info>
17    <title>&os; &release.current; Release Notes</title>
18
19    <author>
20      <orgname>The &os; Project</orgname>
21    </author>
22
23    <pubdate>$FreeBSD: head/release/doc/en_US.ISO8859-1/relnotes/article.xml 301631 2016-06-08 14:21:48Z skreuzer $</pubdate>
24
25    <!-- Last rev: 288943 -->
26
27    <copyright>
28      <year>2015</year>
29      <year>2016</year>
30      <holder role="mailto:doc@FreeBSD.org">The &os; Documentation
31	Project</holder>
32    </copyright>
33
34    <legalnotice xml:id="trademarks" role="trademarks">
35      &tm-attrib.freebsd;
36      &tm-attrib.ibm;
37      &tm-attrib.ieee;
38      &tm-attrib.intel;
39      &tm-attrib.sparc;
40      &tm-attrib.general;
41    </legalnotice>
42
43    <abstract>
44      <para>The release notes for &os; &release.current; contain
45	a summary of the changes made to the &os; base system on the
46	&release.branch; development line.  This document lists
47	applicable security advisories that were issued since the last
48	release, as well as significant changes to the &os; kernel and
49	userland.  Some brief remarks on upgrading are also
50	presented.</para>
51    </abstract>
52  </info>
53
54  <sect1 xml:id="intro">
55    <title>Introduction</title>
56
57    <para>This document contains the release notes for &os;
58      &release.current;.  It describes recently added, changed, or
59      deleted features of &os;.  It also provides some notes on
60      upgrading from previous versions of &os;.</para>
61
62    <para releasetype="current">The &release.type; distribution to
63      which these release notes apply represents the latest point
64      along the &release.branch; development branch since
65      &release.branch; was created.  Information regarding pre-built,
66      binary &release.type; distributions along this branch can be
67      found at <uri
68	xlink:href="&release.url;">&release.url;</uri>.</para>
69
70    <para releasetype="snapshot">The &release.type; distribution to
71      which these release notes apply represents a point along the
72      &release.branch; development branch between &release.prev; and
73      the future &release.next;.  Information regarding pre-built,
74      binary &release.type; distributions along this branch can be
75      found at <uri
76	xlink:href="&release.url;">&release.url;</uri>.</para>
77
78    <para releasetype="release">This distribution of &os;
79      &release.current; is a &release.type; distribution.  It can be
80      found at <uri xlink:href="&release.url;">&release.url;</uri> or
81      any of its mirrors.  More information on obtaining this (or
82      other) &release.type; distributions of &os; can be found in the
83      <link
84	xlink:href="&url.books.handbook;/mirrors.html"><quote>Obtaining
85	  &os;</quote> appendix</link> to the <link
86	xlink:href="&url.books.handbook;/">&os;
87	Handbook</link>.</para>
88
89    <para>All users are encouraged to consult the release errata
90      before installing &os;.  The errata document is updated with
91      <quote>late-breaking</quote> information discovered late in the
92      release cycle or after the release.  Typically, it contains
93      information on known bugs, security advisories, and corrections
94      to documentation.  An up-to-date copy of the errata for &os;
95      &release.current; can be found on the &os; Web site.</para>
96
97    <para>This document describes the most user-visible new or changed
98      features in &os; since &release.prev;.  In general, changes
99      described here are unique to the &release.branch; branch unless
100      specifically marked as &merged; features.</para>
101
102    <para>Typical release note items document recent security
103      advisories issued after &release.prev;, new drivers or hardware
104      support, new commands or options, major bug fixes, or
105      contributed software upgrades.  They may also list changes to
106      major ports/packages or release engineering practices.  Clearly
107      the release notes cannot list every single change made to &os;
108      between releases; this document focuses primarily on security
109      advisories, user-visible changes, and major architectural
110      improvements.</para>
111  </sect1>
112
113  <sect1 xml:id="upgrade">
114    <title>Upgrading from Previous Releases of &os;</title>
115
116    <para arch="amd64,i386">Binary upgrades between RELEASE versions
117      (and snapshots of the various security branches) are supported
118      using the &man.freebsd-update.8; utility.  The binary upgrade
119      procedure will update unmodified userland utilities, as well as
120      unmodified GENERIC kernels distributed as a part of an official
121      &os; release.  The &man.freebsd-update.8; utility requires that
122      the host being upgraded have Internet connectivity.</para>
123
124    <para>Source-based upgrades (those based on recompiling the &os;
125      base system from source code) from previous versions are
126      supported, according to the instructions in
127      <filename>/usr/src/UPDATING</filename>.</para>
128
129    <important>
130      <para>Upgrading &os; should only be attempted after backing up
131	<emphasis>all</emphasis> data and configuration files.</para>
132    </important>
133  </sect1>
134
135  <sect1 xml:id="security-errata">
136    <title>Security and Errata</title>
137
138    <para>This section lists the various Security Advisories and
139      Errata Notices since &release.prev;.</para>
140
141    <sect2 xml:id="security">
142      <title>Security Advisories</title>
143
144      &security;
145    </sect2>
146
147    <sect2 xml:id="errata">
148      <title>Errata Notices</title>
149
150      &errata;
151    </sect2>
152  </sect1>
153
154  <sect1 xml:id="userland">
155    <title>Userland</title>
156
157    <para>This section covers changes and additions to userland
158      applications, contributed software, and system utilities.</para>
159
160    <sect2 xml:id="userland-config">
161      <title>Userland Configuration Changes</title>
162
163      <para revision="266463">The default &man.newsyslog.conf.5; now
164	includes files in the
165	<filename>/etc/newsyslog.conf.d/</filename> and
166	<filename>/usr/local/etc/newsyslog.conf.d/</filename>
167	directories by default for &man.newsyslog.8;.</para>
168
169      <para revision="270675">The &man.mailwrapper.8; utility has been
170	updated to use &man.mailer.conf.5; from the
171	<literal>LOCALBASE</literal> environment variable, which
172	defaults to <filename class="directory">/usr/local</filename>
173	if unset.</para>
174
175      <para revision="272350">The <literal>MK_ARM_EABI</literal>
176	&man.src.conf.5; option has been removed.</para>
177
178      <para revision="301247">The <application>ntp</application> suite
179	has been updated to version 4.2.8p8.</para>
180    </sect2>
181
182    <sect2 xml:id="userland-programs">
183      <title>Userland Application Changes</title>
184
185      <para revision="258838" contrib="sponsor" sponsor="&ff;,
186	&google;" sponsorurl="">The &man.casperd.8; daemon has been
187	added, which provides access to functionality that is not
188	available in the <quote>capability mode</quote>
189	sandbox.</para>
190
191      <para revision="260594">When unable to load a kernel module with
192	&man.kldload.8;, a message informing to view output of
193	&man.dmesg.8; is now printed, opposed to the previous output
194	<quote>Exec format error.</quote>.</para>
195
196      <para revision="260910">Allow &man.pciconf.8; to identify PCI
197	devices that are attached to a driver to be identified by
198	their device name instead of just the selector.  Additionally,
199	an optional device argument to the <literal>-l</literal> flag
200	to restrict the output to only listing details about a single
201	device.</para>
202
203      <para revision="260913">A new flag, <quote>onifconsole</quote>
204	has been added to <filename>/etc/ttys</filename>.  This allows
205	the system to provide a login prompt via serial console if the
206	device is an active kernel console, otherwise it is equivalent
207	to <literal>off</literal>.</para>
208
209      <para revision="260926">Support for displaying VPD for PCI
210	devices via &man.pciconf.8; has been added.</para>
211
212      <para revision="261498">&man.ping.8; protects against malicious
213	network packets using the Capsicum framework to drop
214	privileges.</para>
215
216      <para revision="265229">The &man.ps.1; utility has been
217	updated to include the <literal>-J</literal> flag, used to
218	filter output by matching &man.jail.8; IDs and names.
219	Additionally, argument <literal>0</literal> can be used to
220	<literal>-J</literal> to only list processes running on the
221	host system.</para>
222
223      <para revision="265249">The &man.top.1; utility has been updated
224	to filter by &man.jail.8; ID or name, in followup to the
225	&man.ps.1; change in <literal>r265229</literal>.</para>
226
227      <para revision="266209">The &man.pmcstat.8; utility has been
228	updated to include a new flag, <literal>-l</literal>, which
229	ends event collection after the specified number of
230	seconds.</para>
231
232      <para revision="270745">The &man.ps.1; utility has been updated
233	to include a new keyword, <quote>tracer</quote>, which
234	displays the <acronym>PID</acronym> of the tracing
235	process.</para>
236
237      <para revision="271482">Support for adding empty partitions has
238	been added to the &man.mkimg.1; utility.</para>
239
240      <para revision="272166">The &man.primes.6; utility has been
241	updated to correctly enumerate prime numbers between
242	<literal>4295098369</literal> and
243	<literal>3825123056546413050</literal>, which prior to this
244	change, it would be possible for returned values to be
245	incorrectly identified as prime numbers.</para>
246
247      <para revision="272198">The &man.mkimg.1; utility has been
248	updated to include three options used to print information
249	about &man.mkimg.1; itself:</para>
250
251      <informaltable frame="none" pgwide="0">
252	<tgroup cols="2">
253	  <colspec colwidth="1*"/>
254	  <colspec colwidth="1*"/>
255	  <thead>
256	    <row>
257	      <entry>Option</entry>
258	      <entry>Output</entry>
259	    </row>
260	  </thead>
261
262	  <tbody>
263	    <row>
264	      <entry><literal>--version</literal></entry>
265	      <entry>The current version of the &man.mkimg.1;
266		utility</entry>
267	    </row>
268
269	    <row>
270	      <entry><literal>--formats</literal></entry>
271	      <entry>The disk image file formats supported by
272		&man.mkimg.1;</entry>
273	    </row>
274
275	    <row>
276	      <entry><literal>--schemes</literal></entry>
277	      <entry>The partition schemes supported by
278		&man.mkimg.1;</entry>
279	    </row>
280	  </tbody>
281	</tgroup>
282      </informaltable>
283
284      <para revision="272488">Userland &man.ctf.5; support in
285	&man.dtrace.1; has been added.  With this change,
286	&man.dtrace.1; is able to resolve type info for function and
287	<acronym>USDT</acronym> probe arguments, and function return
288	values.</para>
289
290      <para revision="274960">The &man.elfdump.1; utility has been
291	updated to support capability mode provided by
292	&man.capsicum.4;.</para>
293
294      <para revision="275680" contrib="sponsor" sponsor="&ff;">The
295	&man.fstyp.8; utility has been added, which is used to
296	determine the filesystem on a specified device.</para>
297
298      <para revision="276881">The <literal>libedit</literal> library
299	has been updated to support <acronym>UTF</acronym>-8, which
300	additionally provides unicode support to &man.sh.1;.</para>
301
302      <para revision="276893" contrib="sponsor" sponsor="&ff;">The
303	&man.mkimg.1; utility has been updated to support the
304	<acronym>MBR</acronym> <acronym>EFI</acronym> partition
305	type.</para>
306
307      <para revision="277166" arch="powerpc">The &man.ptrace.2; system
308	call has been updated include support for Altivec registers on
309	&os;/&arch.powerpc;.</para>
310
311      <para revision="278320">A new device control utility,
312	&man.devctl.8; has been added, which allows making
313	administrative changes to individual devices, such as
314	attaching and detaching drivers, and enabling and disabling
315	devices.  The &man.devctl.8; utility uses the new
316	&man.devctl.3; library.</para>
317
318      <para revision="279122" contrib="sponsor"
319	sponsor="&juniper;">The &man.netstat.1; utility has been
320	updated to link against the &man.libxo.3; shared
321	library.</para>
322
323      <para revision="279139">A new flag, <literal>-c</literal>, has
324	been added to the &man.mkimg.1; utility, which allows
325	specifying the capacity of the target disk image.</para>
326
327      <para revision="279315" contrib="sponsor" sponsor="&ff;">The
328	&man.uefisign.8; utility has been added.</para>
329
330      <para revision="279571" contrib="sponsor"
331	sponsor="&scaleengine;">The &man.freebsd-update.8; utility has
332	been updated to prevent fetching updated binary patches when
333	a previous upgrade has not been thoroughly completed.</para>
334
335      <para revision="280870">A regression in the &man.libarchive.3;
336	library that would prevent a directory from being included in
337	the archive when <literal>--one-file-system</literal> is used
338	has been fixed.</para>
339
340      <para revision="281311" contrib="sponsor" sponsor="&ff;">The
341	&man.ar.1; utility has been updated to set
342	<literal>ARCHIVE_EXTRACT_SECURE_SYMLINKS</literal> and
343	<literal>ARCHIVE_EXTRACT_SECURE_NODOTDOT</literal> to disallow
344	directory traversal when extracting an archive, similar to
345	&man.tar.1;.</para>
346
347      <para revision="281617">A race condition in &man.wc.1; that
348	would cause final results to be sent to &man.stderr.4; when
349	receiving the <literal>SIGINFO</literal> signal has been
350	fixed.</para>
351
352      <para revision="282208" contrib="sponsor"
353	sponsor="&multiplay;">The &man.chflags.1;, &man.chgrp.1;,
354	&man.chmod.1;, and &man.chown.8; utilities now affect symbolic
355	links when the <literal>-R</literal> flag is specified, as
356	documented in &man.symlink.7;.</para>
357
358      <para revision="282608">The &man.date.1; utility has been
359	updated to print the modification time of the file passed as
360	an argument to the <literal>-r</literal> flag, improving
361	compatibility with the <acronym>GNU</acronym> &man.date.1;
362	utility behavior.</para>
363
364      <para revision="283961">The &man.pw.8; utility has been updated
365	with a new flag, <literal>-R</literal>, that sets the root
366	directory within which the utility will operate.</para>
367
368      <para revision="284297" contrib="sponsor"
369	sponsor="&clusterhq;">The &man.lockstat.1; utility has been
370	updated with several improvements:</para>
371
372      <itemizedlist>
373	<listitem>
374	  <para>Spin locks are now reported as the amount of time
375	    spinning, instead of loop iterations.</para>
376	</listitem>
377
378	<listitem>
379	  <para>Reader locks are now recognized as adaptive that can
380	    spin on &os;.</para>
381	</listitem>
382
383	<listitem>
384	  <para>Lock aquisition events for successful reader try-lock
385	    events are now reported.</para>
386	</listitem>
387
388	<listitem>
389	  <para>Spin and block events are now reported before lock
390	    acquisition events.</para>
391	</listitem>
392      </itemizedlist>
393
394      <para revision="284589" contrib="sponsor"
395	sponsor="&scaleengine;">The &man.fstyp.8; utility has been
396	updated to be able to detect &man.zfs.8; and &man.geli.8;
397	filesystems.</para>
398
399      <para revision="284883">The &man.mkimg.1; utility has been
400	updated to include support for <literal>NTFS</literal>
401	filesystems in both <acronym>MBR</acronym> and
402	<acronym>GPT</acronym> partitioning schemes.</para>
403
404      <para revision="285253">The &man.quota.1; utility has been
405	updated to include support for <acronym>IPv6</acronym>.</para>
406
407      <para revision="285420">The &man.jexec.8; utility has been
408	updated to include a new flag, <literal>-l</literal>, which
409	ensures a clean environment in the target jail when used.
410	Additionally, &man.jexec.8; will run a shell within the target
411	jail when run no commands are specified.</para>
412
413      <para revision="285550">The &man.w.1; utility has been updated
414	to display the full IPv6 remote address of the host from which
415	a user is connected.</para>
416
417      <para revision="285685">The &man.jail.8; framework has been
418	updated to allow mounting &man.linprocfs.5; and
419	&man.linsysfs.5; within a jail.</para>
420
421      <para revision="285772" contrib="sponsor"
422	sponsor="&emcisilon;">The &man.patch.1; utility has been
423	updated to include a new option to the <literal>-V</literal>
424	flag, <literal>none</literal>, which disables backup file
425	creation when applying a patch.</para>
426
427      <para revision="286010" contrib="sponsor" sponsor="&ff;">The
428	&man.ar.1; utility now enables deterministic mode
429	(<literal>-D</literal>) by default.  This behavior can be
430	disabled by specifying the <literal>-U</literal> flag.</para>
431
432      <para revision="286289" contrib="sponsor"
433	sponsor="&scaleengine;">The &man.xargs.1; utility has been
434	updated to allow specifying <literal>0</literal> as an
435	argument to the <literal>-P</literal> (parallel mode) flag,
436	which allows creating as many concurrent processes as
437	possible.</para>
438
439      <para revision="286795">The &man.patch.1; utility has been
440	updated to remove the automatic checkout feature.</para>
441
442      <para revision="287473" contrib="sponsor" sponsor="&gandi;">A
443	new utility, &man.sesutil.8;, has been added, which is used
444	to manage &man.ses.4; devices.</para>
445
446      <para revision="287522">The &man.pciconf.8; utility has been
447	updated to use the PCI ID database from the <filename
448	  role="package">misc/pciids</filename> package, if present,
449	falling back to the PCI ID database in the &os; base
450	system.</para>
451
452      <para revision="287842" contrib="sponsor"
453	sponsor="&scaleengine;">The &man.ifconfig.8; utility has been
454	updated to always exit with an error code if an important
455	&man.ioctl.2; fails.</para>
456    </sect2>
457
458    <sect2 xml:id="userland-contrib">
459      <title>Contributed Software</title>
460
461      <para revision="260445">&man.byacc.1; has been updated to
462	version 20140101.</para>
463
464      <para revision="296633"><application>OpenSSH</application> has
465	been updated to 7.2p2.</para>
466
467      <para revision="261344"><application>mdocml</application> has
468	been updated to version 1.12.3.</para>
469
470      <para revision="275718">The <application>binutils</application>
471	suite of utilities has been updated to include upstream
472	patches that add new relocations for &arch.powerpc;
473	support.</para>
474
475      <para revision="276398" contrib="sponsor" sponsor="&ff;">The
476	<application>ELF Tool Chain</application> has been updated to
477	upstream revision r3136.</para>
478
479      <para revision="276551">The <application>texinfo</application>
480	utility and <literal>info</literal> pages were removed from
481	the base system.  The <filename
482	  role="package">print/texinfo</filename> port should be
483	installed on systems where <literal>info</literal> pages are
484	needed.</para>
485
486      <para revision="276796" contrib="sponsor" sponsor="&ff;">The ELF
487	object manipulation tools
488	<application>addr2line</application>,
489	<application>elfcopy (strip)</application>,
490	<application>nm</application>,
491	<application>readelf</application>,
492	<application>size</application>, and
493	<application>strings</application> were switched to the
494	versions from the ELF Tool Chain project.</para>
495
496      <para revision="276881">The <literal>libedit</literal> library
497	has been updated to include <acronym>UTF-8</acronym> support,
498	adding <acronym>UTF-8</acronym> support to the &man.sh.1;
499	shell.</para>
500
501      <para revision="278433">The &man.xz.1; utility has been updated
502	to support multi-threaded compression.</para>
503
504      <para revision="280932" contrib="sponsor" sponsor="&ff;">The
505	<application>elftoolchain</application> utilities have been
506	updated to version 3179.</para>
507
508      <para revision="281316">The &man.xz.1; utility has been updated
509	to version 5.2.1.</para>
510
511      <para revision="281373">The &man.nvi.1; utility has been updated
512	to version 2.1.3.</para>
513
514      <para revision="281806">The &man.wpa.supplicant.8; and
515	&man.hostapd.8; utilities have been updated to version
516	2.4.</para>
517
518      <para revision="296190" contrib="sponsor" sponsor="&ff;">The
519	&man.resolvconf.8; utility has been updated to version
520	3.7.3.</para>
521
522      <para revision="284254"><application>bmake</application> has
523	been updated to version 20150606.</para>
524
525      <para revision="285229"><application>sendmail</application> has
526	been updated to 8.15.2.  Starting with &os;&nbsp;11.0 and
527	sendmail 8.15, sendmail uses uncompressed IPv6 addresses by
528	default, i.e., they will not contain <quote>::</quote>.  For
529	example, instead of <quote>::1</quote>, it will be
530	<quote>0:0:0:0:0:0:0:1</quote>.  This permits a zero subnet to
531	have a more specific match, such as different map entries for
532	IPv6:0:0 versus IPv6:0.  This change requires that
533	configuration data (including maps, files, classes, custom
534	ruleset, etc.) must use the same format, so make certain such
535	configuration data is upgrading.  As a very simple check
536	search for patterns like 'IPv6:[0-9a-fA-F:]*::' and 'IPv6::'.
537	To return to the old behavior, set the m4 option
538	<literal>confUSE_COMPRESSED_IPV6_ADDRESSES</literal> or the cf
539	option <literal>UseCompressedIPv6Addresses</literal>.</para>
540
541      <para revision="285275">The &man.tcpdump.1; utility has been
542	updated to version 4.7.4.</para>
543
544      <para revision="298998"><application>OpenSSL</application> has
545	been updated to version 1.0.2h.</para>
546
547      <para revision="285642" contrib="sponsor" sponsor="&dell;">The
548	&man.ssh.1; utility has been updated to re-implement hostname
549	canonicalization before locating the host in
550	<filename>known_hosts</filename>.</para>
551
552      <para revision="285972">The &man.libarchive.3; library has been
553	updated to properly skip a sparse file entry in a &man.tar.1;
554	file, which would previously produce errors.</para>
555
556      <para revision="286503">The <application>apr</application>
557	library used by &man.svnlite.1; has been updated to version
558	1.5.2.</para>
559
560      <para revision="286505">The <application>serf</application>
561	library used by &man.svnlite.1; has been updated to version
562	1.3.8.</para>
563
564      <para revision="286505">The &man.svnlite.1; utility has been
565	updated to version 1.8.14.</para>
566
567      <para revision="298161">The <application>sqlite3</application>
568	library used by &man.svnlite.1; and &man.kerberos.8; has been
569	updated to version 3.12.1.</para>
570
571      <para revision="286750">Timezone data files have been updated to
572	version 2015f.</para>
573
574      <para revision="287168">The &man.acpi.4; subsystem has been
575	updated to version 20150818.</para>
576
577      <para revision="287917">The &man.unbound.8; utility has been
578	updated to version 1.5.4.</para>
579
580      <para revision="288090">&man.jemalloc.3; has been updated to
581	version 4.0.2.</para>
582
583      <para revision="298192">The &man.file.1; utility has been
584	updated to version 5.26.</para>
585
586      <para revision="288303">The &man.nc.1; utility has been updated
587	to the OpenBSD 5.8 version.</para>
588
589      <para revision="296417"><application>Clang</application> has
590	been updated to version 3.8.0.</para>
591
592      <para revision="296417"><application>LLVM</application> has
593	been updated to version 3.8.0.</para>
594
595      <para revision="296417"><application>LLDB</application> has
596	been updated to version 3.8.0.</para>
597
598      <para revision="296417"><application>libc++</application> has
599	been updated to version 3.8.0.</para>
600
601      <para revision="296417">The
602	<application>compiler_rt</application> utility has been
603	updated to version 3.8.0.</para>
604    </sect2>
605
606    <sect2 xml:id="userland-installer">
607      <title>Installation and Configuration Tools</title>
608
609      <para revision="271539">The &man.bsdinstall.8; partition editor
610	and &man.sade.8; utility have been updated to include native
611	<acronym>ZFS</acronym> support.</para>
612
613      <para revision="272274">The &os; installation utility,
614	&man.bsdinstall.8;, has been updated to set the
615	<literal>canmount</literal> &man.zfs.8; property to
616	<literal>off</literal> for the <filename
617	  class="directory">/var</filename> dataset, preventing the
618	contents of directories within <filename
619	  class="directory">/var</filename> from conflicting when
620	using multiple boot environments, such as that provided by
621	<filename role="package">sysutils/beadm</filename>.</para>
622
623      <para revision="274394">The &man.bsdconfig.8; utility has been
624	updated to skip the initial &man.tzsetup.8;
625	<acronym>UTC</acronym> versus wall-clock time prompt when run
626	in a virtual machine, determined when the
627	<literal>kern.vm_guest</literal> &man.sysctl.8; is set to
628	<literal>1</literal>.</para>
629
630      <para revision="275874">The &man.bsdinstall.8; utility has been
631	updated to use the new &man.dpv.3; library to display progress
632	when extracting the &os; distributions.</para>
633
634      <para revision="285557" contrib="sponsor"
635	sponsor="&scaleengine;">Support for detecting and implementing
636	aligning partitions on 1Mb boundaries has been added to
637	&man.bsdinstall.8;.</para>
638
639      <para revision="285679" contrib="sponsor"
640	sponsor="&scaleengine;">Support for detecting and implementing
641	a workaround for various laptops and motherboards that do not
642	boot properly from <acronym>GPT</acronym>-partitioned disks
643	has been added to &man.bsdinstall.8;.  Additionally, the
644	<literal>active</literal> flag will be set on the partition
645	when needed.</para>
646
647      <para revision="285679" contrib="sponsor"
648	sponsor="&scaleengine;">Support for selecting the partitioning
649	scheme when installing on the <acronym>UFS</acronym>
650	filesystem has been added to &man.bsdinstall.8;.</para>
651    </sect2>
652
653    <sect2 xml:id="userland-rc">
654      <title><filename class="directory">/etc/rc.d</filename>
655	Scripts</title>
656
657      <para revision="270676">The &man.rc.8; subsystem has been
658	updated to allow configuring services in <filename
659	  class="directory">&dollar;{LOCALBASE}/etc/rc.conf.d/</filename>.
660	If <literal>LOCALBASE</literal> is unset, it defaults to
661	<filename class="directory">/usr/local</filename>.</para>
662
663      <para revision="273955">A new &man.rc.8; script,
664	<filename>growfs</filename>, has been added, which will resize
665	the root filesystem on boot if <filename>/firstboot</filename>
666	exists.</para>
667
668      <para revision="275299">The <filename>mrouted</filename>
669	&man.rc.8; script has been removed from the base system.  An
670	equivalent script is available from the <filename
671	  role="package">net/mrouted</filename> port.</para>
672
673      <para revision="279463" contrib="sponsor"
674	sponsor="&sandvine;">A new &man.rc.8; script,
675	<filename>iovctl</filename>, has been added, which allows
676	automatically starting the &man.iovctl.8; utility at
677	boot.</para>
678
679      <para revision="287576" contrib="sponsor"
680	sponsor="&scaleengine;">The &man.service.8; utility has been
681	updated to honor entries within <filename
682	  class="directory">/etc/rc.conf.d/</filename>.</para>
683
684    </sect2>
685
686    <sect2 xml:id="userland-periodic">
687      <title><filename class="directory">/etc/periodic</filename>
688	Scripts</title>
689
690      <para revision="271321">The daily &man.periodic.8; script
691	<filename>110.clean-tmps</filename> has been updated to avoid
692	crossing filesystem mount boundaries when cleaning files in
693	<filename class="directory">/tmp</filename>.</para>
694
695      <para revision="277216" contrib="sponsor" sponsor="&ff;">A new
696	&man.periodic.8; script,
697	<filename>510.status-world-kernel</filename>, has been added,
698	which evaluates the running userland and kernel versions from
699	the &man.uname.1; <literal>-U</literal> and
700	<literal>-K</literal> arguments, and prints an error if the
701	system userland and kernel are not in sync.</para>
702    </sect2>
703
704    <sect2 xml:id="userland-libraries">
705      <title>Runtime Libraries and API</title>
706
707      <para revision="265995">The Blowfish &man.crypt.3; default
708	format has been changed to
709	<literal>&dollar;2b&dollar;</literal>.</para>
710
711      <para revision="268461">The &man.readline.3; library is now
712	statically linked in software within the base system, and the
713	shared library is no longer installed, allowing the Ports
714	Collection to use a modern version of the library.</para>
715
716      <para revision="272273">The &man.strptime.3; library has been
717	updated to add support for <acronym>POSIX</acronym>-2001
718	features <literal>%U</literal> and
719	<literal>%W</literal>.</para>
720
721      <para revision="272842,272848" contrib="sponsor"
722	sponsor="&ff;">The &man.dl.iterate.phdr.3; library has been
723	changed to always return the path name of the
724	<acronym>ELF</acronym> object in the
725	<literal>dlpi_name</literal> structure member.</para>
726
727      <para revision="273562" contrib="sponsor"
728	sponsor="&juniper;">The &man.libxo.3; library has been
729	imported to the base system.</para>
730
731      <para revision="273806" contrib="sponsor" sponsor="&chelsio;">A
732	userland library for Chelsio Terminator 5 based iWARP cards
733	has been added, allowing userland <acronym>RDMA</acronym>
734	applications to work over compatible
735	<acronym>NIC</acronym>s.</para>
736
737      <para revision="274987">The &man.gpio.3; library has been added,
738	providing a wrapper around the &man.gpio.4; kernel
739	interface.</para>
740
741      <para revision="275800" contrib="sponsor" sponsor="&ff;">The
742	&man.procctl.2; system call has been updated to include
743	a facility for non-&man.init.8; processes to be declared as
744	the reaper of child processes and their decendants.</para>
745
746      <para revision="277610">The <literal>futimens()</literal> and
747	<literal>utimensat()</literal> system calls have been
748	added.  See &man.utimensat.2; for more information.</para>
749
750      <para revision="278934">The &man.elf.3; compile-time dependency
751	has been removed from <filename>dtri.o</filename>, which
752	allows adding <application>DTrace</application> probes to
753	userland applications and libraries without also linking
754	against &man.elf.3;.</para>
755
756      <para revision="279186">The &man.setmode.3; function has been
757	updated to consistently set <literal>errno</literal> on
758	failure.</para>
759
760      <para revision="279663">The &man.qsort.3; functions have been
761	updated to be able to handle 32-bit aligned data on 64-bit
762	platforms, also providing a significant improvement in 32-bit
763	workloads.</para>
764
765      <para revision="281130">Several standard include headers have
766	been updated to use of <application>gcc</application>
767	attributes, such as <literal>__result_use_check()</literal>,
768	<literal>__alloc_size()</literal>, and
769	<literal>__nonnull()</literal>.</para>
770
771      <para revision="281845">Support for file verification in
772	<acronym>MAC</acronym> has been added.</para>
773
774      <para revision="282973" contrib="sponsor" sponsor="&ff;">The
775	<literal>libgomp</literal> library is now only built when
776	building <acronym>GCC</acronym> from the base system.  An
777	up-to-date version is available in the Ports Collection as
778	<filename
779	  role="package">devel/libiomp5-devel</filename>.</para>
780
781      <para revision="282988">The <filename>stdlib.h</filename> and
782	<filename>malloc.h</filename> headers have been updated to
783	make use of the <application>gcc</application>
784	<literal>alloc_align()</literal> attribute.</para>
785
786      <para revision="284483" contrib="sponsor"
787	sponsor="&scaleengine;">The Blowfish &man.crypt.3; library
788	has been updated to support &dollar;2y&dollar; hashes.</para>
789
790      <para revision="285277">The &man.execl.3; and &man.execlp.3;
791	library functions have been updated to use the
792	<literal>__sentinel</literal> <application>gcc</application>
793	attribute.</para>
794    </sect2>
795
796    <sect2 xml:id="userland-abi">
797      <title>ABI Compatibility</title>
798
799      <para revision="271982">The &linux; compatibility version has
800	been updated to <literal>2.6.18</literal>.  The
801	<literal>compat.linux.osrelease</literal> &man.sysctl.8; is
802	evaluated when building the <filename
803	  role="package">emulators/linux-c6</filename> and related
804	ports.</para>
805
806      <para revision="288669">The stack protector has been upgraded to
807	the "strong" level, elevating the protection against buffer
808	overflows.  While this significantly improves the security of
809	the system, extensive testing was done to ensure there are no
810	measurable side effects in performance or
811	functionality.</para>
812    </sect2>
813  </sect1>
814
815  <sect1 xml:id="kernel">
816    <title>Kernel</title>
817
818    <para>This section covers changes to kernel configurations, system
819      tuning, and system control parameters that are not otherwise
820      categorized.</para>
821
822    <sect2 xml:id="kernel-bugfix">
823      <title>Kernel Bug Fixes</title>
824
825      <para revision="265876">A kernel bug that inhibited proper
826	functionality of the <literal>dev.cpu.0.freq</literal>
827	&man.sysctl.8; on &intel; processors with Turbo
828	Boost&nbsp;&trade; enabled has been fixed.</para>
829
830      <para revision="271697" arch="powerpc">Support for
831	&man.dtrace.1; stack tracing has been fixed for
832	&os;/&arch.powerpc;, using the <literal>trapexit()</literal>
833	and <literal>asttrapexit()</literal> functions instead of
834	checking within addressed kernel space.</para>
835
836      <para revision="271917">A kernel panic triggered when destroying
837	a &man.vnet.9; &man.jail.8; configured with &man.gif.4; has
838	been fixed.</para>
839
840      <para revision="271918">A kernel panic triggered when destroying
841	a &man.vnet.9; &man.jail.8; configured with &man.gre.4; has
842	been fixed.</para>
843
844      <para revision="272089">A bug in &man.ipfw.4; that could
845	potentially lead to a kernel panic when using &man.dummynet.4;
846	at layer 2 has been fixed.</para>
847
848      <para revision="280930" contrib="sponsor" sponsor="&mitail;">The
849	kernel <acronym>RPC</acronym> has been updated to include
850	several enhancements:</para>
851
852      <itemizedlist>
853	<listitem>
854	  <para>The 45 MiB limit on requests queued for
855	    &man.nfsd.8; threads has been removed.</para>
856	</listitem>
857
858	<listitem>
859	  <para>Avoids unnecessary throttling by not deferring
860	    accounting for completed requests.</para>
861	</listitem>
862
863	<listitem>
864	  <para>Fixes an integer overflow and signedness bugs.</para>
865	</listitem>
866      </itemizedlist>
867
868      <para revision="281261" arch="powerpc">Support for
869	&man.dtrace.1; has been added for the
870	Book-E&nbsp;&trade;.</para>
871
872      <para revision="287886" contrib="sponsor"
873	sponsor="&multiplay;">The &man.kqueue.2; system call has been
874	updated to handle write events to files larger than 2
875	gigabytes.</para>
876    </sect2>
877
878    <sect2 xml:id="kernel-config">
879      <title>Kernel Configuration</title>
880
881      <para revision="266531">The <literal>IMAGACT_BINMISC</literal>
882	kernel configuration option has been enabled by default,
883	which enables application execution through emulators, such
884	as <application>Qemu</application>.</para>
885
886      <para revision="268045">The <literal>VT</literal> kernel
887	configuration file has been removed, and the &man.vt.4;
888	driver is included in the <literal>GENERIC</literal> kernel.
889	To enable &man.vt.4;, enter <literal>set kern.vty=vt</literal>
890	at the &man.loader.8; prompt during boot, or add
891	<literal>kern.vty=vt</literal> to &man.loader.conf.5; and
892	reboot the system.</para>
893
894      <para revision="277904">The &man.config.8; utility has been
895	updated to allow using a non-standard <filename
896	  class="directory">src/</filename> tree, specified as an
897	argument to the <literal>-s</literal> flag.</para>
898
899      <para revision="277990" arch="powerpc64">The
900	&os;/&arch.powerpc64; kernel now builds as
901	a position-independent executable, allowing the kernel to be
902	loaded into and run from any physical or virtual
903	address.</para>
904
905      <important>
906	<para>This change requires an update to &man.loader.8;.
907	  The userland and kernel must be updated before rebooting the
908	  system.</para>
909      </important>
910
911      <para revision="278338" arch="arm">A new module for creating
912	<filename>rpi.dtb</filename> has been added for the Raspberry
913	Pi.</para>
914
915      <para revision="278340" arch="arm">The
916	<filename>rpi.dtb</filename> module is now installed to
917	<filename class="directory">/boot/dtb/</filename> by
918	default for the Raspberry Pi system.</para>
919
920      <para revision="279189" contrib="sponsor" sponsor="&ff;"
921	arch="powerpc">Kernel support for Vector-Scalar eXtension
922	(<acronym>VSX</acronym>) found on POWER7 and POWER8 hardware
923	has been added.</para>
924
925      <para revision="279252" contrib="sponsor" sponsor="&ff;"
926	arch="powerpc">The &man.pmap.9; implementation for 64-bit
927	&powerpc; processors has been overhaulded to improve
928	concurrency.</para>
929
930      <para revision="279824" arch="arm">A new module for creating
931	the <filename>dtb</filename> module for AM335x systems has
932	been added.</para>
933
934      <para revision="281495" contrib="sponsor" sponsor="&ff;">The
935	<literal>PAE_TABLES</literal> kernel configuration option has
936	been added for &os;/&arch.i386;, which instructs &man.pmap.9;
937	to use <acronym>PAE</acronym> format for page tables while
938	maintaining a 32-bit physical address size elsewhere in the
939	kernel.  The use of this option can enhance application-level
940	security by enabling the creation of <quote>no execute</quote>
941	mappings on modern &arch.i386; processors.  Unlike the
942	<literal>PAE</literal> option, <literal>PAE_TABLES</literal>
943	preserves kernel binary interface (<acronym>KBI</acronym>)
944	compatibility with non-<literal>PAE</literal> kernels,
945	allowing non-<literal>PAE</literal> kernel modules and drivers
946	to work with a <literal>PAE_TABLES</literal>-enabled kernel.
947	Additionally, system limits are tuned for 4GB maximum
948	<acronym>RAM</acronym>, avoiding kernel virtual address space
949	(<acronym>KVA</acronym>) exhaustion.</para>
950
951      <para revision="282215">The <literal>SIFTR</literal> kernel
952	configuration has been added, allowing building &man.siftr.4;
953	statically into the kernel.</para>
954
955      <para revision="282731" arch="arm">The &arch.arm; boot loader,
956	<filename>ubldr</filename>, is now relocatable.  In addition,
957	<filename>ubldr.bin</filename> is now created during build
958	time, which is a stripped binary with an entry point of
959	<literal>0</literal>, providing the ability to specify the
960	load address by running <literal>go
961	  &dollar;{loadaddr}</literal> in
962	<literal>u-boot</literal>.</para>
963
964      <para revision="282921" contrib="sponsor" sponsor="&intelcorp;"
965	arch="amd64,i386">The &man.nvd.4; and &man.nvme.4; drivers are
966	now included in the <filename>GENERIC</filename> kernel
967	configuration by default.</para>
968
969      <para revision="283959" contrib="sponsor"
970	sponsor="&limelight;">A new kernel configuration option,
971	<literal>EM_MULTIQUEUE</literal>, has been added which enables
972	multi-queue support in the &man.em.4; driver.</para>
973
974      <note>
975	<para>Multi-queue support in the &man.em.4; driver is not
976	  officially supported by &intel;.</para>
977      </note>
978
979      <para revision="285142" contrib="sponsor"
980	sponsor="&netgate;">The <filename>GENERIC</filename> kernel
981	configuration has been updated to include the
982	<literal>IPSEC</literal> option by default.</para>
983
984      <para revision="285387" contrib="sponsor"
985	sponsor="&norse;, &dell;">Initial <acronym>NUMA</acronym>
986	affinity and policy configuration has been added.  See
987	&man.numactl.1;, and &man.numa.getaffinity.2;, for usage
988	details.</para>
989
990      <para revision="286231">The &man.pms.4; driver has been added
991	to the <filename>GENERIC</filename> kernel configuration for
992	supported architectures.</para>
993
994      <para revision="287306" arch="arm">The
995	<filename>CUBIEBOARD2</filename> kernel configuration has been
996	renamed to <filename>A20</filename>.</para>
997
998      <para revision="288176" contrib="sponsor" sponsor="&ff;">Kernel
999	debugging symbols are now installed to <filename
1000	  class="directory">/usr/lib/debug/boot/kernel/</filename>.
1001	To retain the previous behavior, add
1002	<literal>KERN_DEBUGDIR=""</literal> to
1003	&man.src.conf.5;.</para>
1004    </sect2>
1005
1006    <sect2 xml:id="kernel-sysctl">
1007      <title>System Tuning and Controls</title>
1008
1009      <para revision="275140" contrib="sponsor" sponsor="&ff;">The
1010	&man.hwpmc.4; default and maximum callchain depths have been
1011	increased.  The default has been increased from 16 to 32, and
1012	the maximum increased from 32 to 128.</para>
1013
1014      <para revision="279361">The <literal>kern.osrelease</literal>
1015	and <literal>kern.osreldate</literal> are now configurable
1016	&man.jail.8; parameters.</para>
1017
1018      <para revision="280308,280949" contrib="sponsor"
1019	sponsor="&ix;, &ff;">The &man.devfs.5; device filesystem has
1020	been changed to update timestamps for read/write operations
1021	using seconds precision.  A new &man.sysctl.8;,
1022	<literal>vfs.devfs.dotimes</literal> has been added, which
1023	when set to a non-zero value, enables default precision
1024	timestamps for these operations.</para>
1025
1026      <para revision="282213" contrib="sponsor" sponsor="&ff;">A new
1027	&man.sysctl.8;, <literal>kern.racct.enable</literal>, has been
1028	added, which when set to a non-zero value allows using
1029	&man.rctl.8; with the <literal>GENERIC</literal> kernel.
1030	A new kernel configuration option,
1031	<literal>RACCT_DISABLED</literal> has also been added.</para>
1032
1033      <para revision="282901" contrib="sponsor" sponsor="&ff;">The
1034	<literal>GENERIC</literal> kernel configuration now includes
1035	<literal>RACCT</literal> and <literal>RCTL</literal> by
1036	default.</para>
1037
1038      <note>
1039	<para>To enable <literal>RACCT</literal> and
1040	  <literal>RCTL</literal> on a system using the
1041	  <literal>GENERIC</literal> kernel configuration, add
1042	  <literal>kern.racct.enable=1</literal> to
1043	  &man.loader.conf.5;, and reboot the system.</para>
1044      </note>
1045
1046      <para revision="283136" contrib="sponsor"
1047	sponsor="&limelight;">A new &man.sysctl.8;,
1048	<literal>net.inet.tcp.hostcache.purgenow</literal>, has
1049	been added, which when set to <literal>1</literal> during
1050	runtime will flush all
1051	<literal>net.inet.tcp.hostcache</literal> entries.</para>
1052
1053      <para revision="285524">A new &man.sysctl.8;,
1054	<literal>hw.model</literal>, has been added, which displays
1055	<acronym>CPU</acronym> model information.</para>
1056
1057      <para revision="286591">The &man.uart.4; driver has been
1058	updated to allow tuning pulses per second captured in the
1059	CTS line during runtime, whereas previously only the DCD line
1060	could be used without rebuilding the kernel.</para>
1061    </sect2>
1062  </sect1>
1063
1064  <sect1 xml:id="drivers">
1065    <title>Devices and Drivers</title>
1066
1067    <para>This section covers changes and additions to devices and
1068      device drivers since &release.prev;.</para>
1069
1070    <sect2 xml:id="drivers-device">
1071      <title>Device Drivers</title>
1072
1073      <para revision="260903">Support for GPS ports has been added to
1074	&man.uhso.4;.</para>
1075
1076      <para revision="265132">The &man.full.4; device has been added,
1077	and the <literal>lindev(4)</literal> device has been removed.
1078	Prior to this change, <literal>lindev(4)</literal> provided
1079	only the <filename>/dev/full</filename> character device,
1080	returning <literal>ENOSPC</literal> on write attempts.  As
1081	this device is not specific to &linux;, a native &os; version
1082	has been added.</para>
1083
1084      <para revision="271705">Hardware context support has been
1085	added to the <literal>drm/i915</literal> driver, adding
1086	support for <application>Mesa</application> 9.2 and
1087	later.</para>
1088
1089      <para revision="273178">The &man.vt.4; driver has been updated,
1090	replacing the bitmapped <literal>kern.vt.spclkeys</literal>
1091	&man.sysctl.8; with individual
1092	<literal>kern.vt.kbd_*</literal> variants.</para>
1093
1094      <para revision="273598">The &man.hpet.4; driver has been updated
1095	to create a
1096	<filename>/dev/hpet<replaceable>N</replaceable></filename>
1097	device, providing access to <acronym>HPET</acronym> from
1098	userspace.</para>
1099
1100      <para revision="280183">The <literal>drm</literal> code has
1101	been updated to match &linux; version 3.8.13.</para>
1102
1103      <para revision="281440">The &man.psm.4; driver has been updated
1104	to include improved support for newer Synaptics&nbsp;&reg;
1105	touchpads and the ClickPad&nbsp;&reg; mouse on newer
1106	Lenovo&nbsp;&trade; laptops.</para>
1107
1108      <para revision="282783" arch="powerpc">Support for the Freescale
1109	<acronym>PCI</acronym> Root Complex device has been
1110	added.</para>
1111
1112      <para revision="285876">The &man.cyapa.4; driver has been added,
1113	supporting the Cypress APA I2C trackpad.</para>
1114
1115      <para revision="285883">The &man.isl.4; driver has been added,
1116	supporting the Intersil I2C ISL29018 digital ambient light
1117	sensor.</para>
1118    </sect2>
1119
1120    <sect2 xml:id="drivers-storage">
1121      <title>Storage Drivers</title>
1122
1123      <para revision="265236" contrib="sponsor"
1124	sponsor="&lsi;, &spectralogic;" sponsorurl="">The &man.mpr.4;
1125	device has been added, providing support for LSI Fusion-MPT
1126	3 12Gb SCSI/SATA controllers.</para>
1127
1128      <para revision="265555" contrib="sponsor"
1129	  sponsor="&lsi;">The &man.mrsas.4; driver has been added,
1130	providing support for LSI MegaRAID SAS controllers.  The
1131	&man.mfi.4; driver will attach to the controller, by default.
1132	To enable &man.mrsas.4; add
1133	<literal>hw.mfi.mrsas_enable=1</literal> to
1134	<filename>/boot/loader.conf</filename>, which turns off
1135	&man.mfi.4; device probing.</para>
1136
1137      <note>
1138	<para>At this time, the &man.mfiutil.8; utility and the &os;
1139	  version of <application>MegaCLI</application> and
1140	  <application>StorCli</application> do not work with
1141	  &man.mrsas.4;.</para>
1142      </note>
1143
1144      <para revision="275461" contrib="sponsor" sponsor="&ix;">The
1145	&man.ctl.4; subsystem has been updated, increasing the ports
1146	limit from <literal>128</literal> to <literal>256</literal>,
1147	and <acronym>LUN</acronym> limit from <literal>256</literal>
1148	to <literal>1024</literal>.</para>
1149
1150      <para revision="276526">The <literal>asr(4)</literal> driver has
1151	been removed, and is no longer supported.</para>
1152
1153      <para revision="281387">The &man.hptnr.4; driver has been
1154	updated to version 1.1.1.</para>
1155
1156      <para revision="285662">The &man.pms.4; driver has been added,
1157	providing support for the PMC Sierra line of
1158	<acronym>SAS</acronym>/<acronym>SATA</acronym> host bus
1159	adapters.</para>
1160
1161      <para revision="287117" contrib="sponsor"
1162	sponsor="&emcisilon;">The &man.ioat.4; driver has been added,
1163	providing support for the <acronym>PSE</acronym> (Platform
1164	Storage Extension).</para>
1165
1166      <para revision="287621" contrib="sponsor" sponsor="&ix;">The
1167	<acronym>CTL</acronym> High Availability implementation has
1168	been rewritten.</para>
1169
1170      <para revision="288310">The &man.ctl.4; driver has been updated
1171	to support CD-ROM and removable devices.</para>
1172
1173      <para contrib="sponsor" sponsor="&ix;">The &man.isp.4; driver has
1174	been updated and improved: added support for 16Gbps FC cards,
1175	improved target mode support, completed Multi-ID (NPIV)
1176	functionality.</para>
1177    </sect2>
1178
1179    <sect2 xml:id="drivers-network">
1180      <title>Network Drivers</title>
1181
1182      <para revision="258830">Support for Broadcom chipsets BCM57764,
1183	BCM57767, BCM57782, BCM57786 and BCM57787 has been added to
1184	&man.bge.4;.</para>
1185
1186      <para revision="260448">Support for the &intel; Centrino&trade;
1187	Wireless-N 135 chipset has been added.</para>
1188
1189      <para revision="260552">Firmware for &intel; Centrino&trade;
1190	Wireless-N 105 devices has been added to the base
1191	system.</para>
1192
1193      <para revision="261975">The deprecated nve(4) driver has been
1194	removed.  Users of NVIDIA nForce MCP network adapters are
1195	advised to use the &man.nfe.4; driver instead, which has been
1196	the default driver for this hardware since
1197	&os;&nbsp;7.0.</para>
1198
1199      <para revision="264601" contrib="sponsor"
1200	sponsor="&darpa_afrl;">The <literal>if_nf10bmac(4)</literal>
1201	device has been added, providing support for NetFPGA-10G
1202	Embedded CPU Ethernet Core.</para>
1203
1204      <note>
1205	<para>The <literal>if_nf10bmac(4)</literal> driver operates on
1206	  the FPGA, and is not suited for the PCI host
1207	  interface.</para>
1208      </note>
1209
1210      <para revision="265348" contrib="sponsor"
1211	sponsor="&netgate;">The &man.ath.hal.4; driver has been
1212	updated to support the Atheros AR1111 chipset.</para>
1213
1214      <para revision="266770">Support for the &intel; Centrino&trade;
1215	Wireless-N 105 chipset has been added.</para>
1216
1217      <para revision="266757" contrib="sponsor"
1218	sponsor="&chelsio;">Support for the &man.cxgbe.4; Terminator
1219	5 (T5) 10G/40G cards has been added to &man.netmap.4;.</para>
1220
1221      <para revision="272730">The &man.alc.4; driver has been updated
1222	to support AR816x and AR817x ethernet controllers.</para>
1223
1224      <para revision="272906">The &man.pf.4; packet filter default
1225	hash has been changed from <literal>Jenkins</literal> to
1226	<literal>Murmur3</literal>, providing a 3-percent performance
1227	increase in packets-per-second.</para>
1228
1229      <para revision="273331">The &man.vxlan.4; driver has been added,
1230	which creates a virtual Layer 2 (Ethernet) network overlaid in
1231	a Layer 3 (IP/UDP) network.  The &man.vxlan.4; driver is
1232	analogous to &man.vlan.4;, but is designed to be better suited
1233	for large, multiple-tenant datacenter environments.</para>
1234
1235      <para revision="274246" contrib="sponsor" sponsor="&yandex;">The
1236	&man.gre.4; driver has been significantly overhauled, and has
1237	been split into two separate modules, &man.gre.4; and
1238	&man.me.4;.</para>
1239
1240      <para revision="278551">The &man.ral.4; driver has been updated
1241	to support the RT5390 and RT5392 chipsets.</para>
1242
1243      <para revision="283514" contrib="sponsor"
1244	sponsor="&solarflare;">The &man.sfxge.4; driver has been
1245	updated to support Solarflare Flareon Ultra 7000-series
1246	chipsets.</para>
1247
1248      <para revision="283766" contrib="sponsor"
1249	sponsor="&limelight;">The &man.em.4; driver has been updated
1250	with improved transmission queue hang detection.</para>
1251
1252      <para revision="284125">The &man.cdce.4; driver has been updated
1253	to include support for the RTL8153 chipset.</para>
1254
1255      <para revision="286441">The &man.iwm.4; driver has been imported
1256	from OpenBSD, providing support for &intel; 3160/7260/7265
1257	wireless chipsets.</para>
1258
1259      <para revision="286829" contrib="sponsor"
1260	sponsor="&limelight;">The &man.em.4; driver has been updated
1261	to allow disabling <acronym>CRC</acronym> stripping.</para>
1262
1263      <para revision="287222">The &man.pf.4; implementation has been
1264	updated to remove support for the <literal>scrub fragment
1265	  crop|drop-ovl</literal> filtering rule.  Systems with this
1266	rule in &man.pf.conf.5; will implicitly be converted to the
1267	<literal>scrub fragment reassemble</literal> filtering rule,
1268	without necessary intervention.</para>
1269
1270      <para revision="288654">The &man.lagg.4; driver has been updated
1271	to remove support for the <literal>fec</literal>
1272	protocol.</para>
1273    </sect2>
1274  </sect1>
1275
1276  <sect1 xml:id="hardware">
1277    <title>Hardware Support</title>
1278
1279    <para>This section covers general hardware support for physical
1280      machines, hypervisors, and virtualization environments, as well
1281      as hardware changes and updates that do not otherwise fit in
1282      other sections of this document.</para>
1283
1284    <sect2 xml:id="hardware-support">
1285      <title>Hardware Support</title>
1286
1287      <para revision="268303">The &man.asmc.4; driver has been
1288	updated to support the &apple;&nbsp;MacMini 3,1.</para>
1289
1290      <para revision="268351">Support for &os;/ia64 has been dropped
1291	as of &os;&nbsp;11.</para>
1292
1293      <para revision="274386">An issue that could cause a system to
1294	hang when entering <acronym>ACPI</acronym>
1295	<literal>S3</literal> state (suspend to
1296	<acronym>RAM</acronym>) has been corrected in the &man.acpi.4;
1297	and &man.pci.4; drivers.</para>
1298
1299      <para revision="274733" arch="powerpc">The power management unit
1300	subsystem has been updated to support power button events on
1301	certain &arch.powerpc; hardware, such as aluminum
1302	PowerBook&nbsp;&reg;.</para>
1303
1304      <para revision="275171,275190" arch="powerpc">The &man.hwpmc.4;
1305	driver has been updated to correct performance counter
1306	sampling on G4 (MPC74xxx) and G5 class processors.</para>
1307
1308      <para revision="275732" contrib="sponsor"
1309	sponsor="&ff;,&netgate;">The
1310	<application>OpenCrypto</application> framework has been
1311	updated to include <literal>AES-ICM</literal> and
1312	<literal>AES-GCM</literal> modes, both of which have also been
1313	added to the &man.aesni.4; driver.</para>
1314
1315      <para revision="281713" arch="powerpc">The &man.hwpmc.4;
1316	driver has been updated to support the Freescale e500
1317	core.</para>
1318
1319      <para revision="283766">The &man.ig4.4; driver has been added,
1320	providing support for the fourth generation &intel;
1321	<acronym>I2C</acronym> SMBus.</para>
1322
1323      <para>The &man.uart.4; driver has been updated to support
1324	<acronym>AMT</acronym> devices on newer systems.</para>
1325
1326      <para revision="285316" contrib="sponsor" sponsor="&ff;"
1327	arch="arm64">Initial <acronym>SMP</acronym> support has been
1328	added to the &os;/&arch.arm64; port.</para>
1329    </sect2>
1330
1331    <sect2 xml:id="hardware-virtualization">
1332      <title>Virtualization Support</title>
1333
1334      <para revision="260410">Support for the <quote>Virtual Interrupt
1335	  Delivery</quote> feature of &intel;&nbsp;VT-x is enabled if
1336	supported by the CPU.  This feature can be disabled by running
1337	<literal>sysctl hw.vmm.vmx.use_apic_vid=0</literal>.
1338	Additionally, to persist this setting across reboots, add
1339	<literal>hw.vmm.vmx.use_apic_vid=0</literal> to
1340	<filename>/etc/sysctl.conf</filename>.</para>
1341
1342      <para revision="260532">Support for <quote>Posted Interrupt
1343	  Processing</quote> is enabled if supported by the CPU.  This
1344	feature can be disabled by running <literal>sysctl
1345	  hw.vmm.vmx.use_apic_pir=0</literal>.  Additionally, to
1346	persist this setting across reboots, add
1347	<literal>hw.vmm.vmx.use_apic_pir=0</literal> to
1348	<filename>/etc/sysctl.conf</filename>.</para>
1349
1350      <para revision="260582">Unmapped IO support has been added to
1351	&man.virtio_blk.4;.</para>
1352
1353      <para revision="260583">Unmapped IO support has been added to
1354	&man.virtio_scsi.4;.</para>
1355
1356      <para revision="260847">The &man.virtio_random.4; driver has
1357	been added to harvest entropy from the host system.</para>
1358
1359      <para revision="261504">&os;/&arch.i386; guests can be run under
1360	bhyve.</para>
1361
1362      <para revision="267536" contrib="sponsor"
1363	sponsor="&citrix.rd;">Support for running a &os;/&arch.amd64;
1364	<application>Xen</application> guest instance as
1365	<acronym>PVH</acronym> guest has been added.
1366	<acronym>PVH</acronym> mode, short for <quote>Para-Virtualized
1367	  Hardware</quote>, uses para-virtualized drivers for boot and
1368	I/O, and uses hardware virtualization extensions for all other
1369	tasks, without the need for emulation.</para>
1370
1371      <para revision="273375">The &man.bhyve.8; hypervisor has been
1372	updated to support &amd; processors with
1373	<acronym>SVM</acronym> and <acronym>AMD-V</acronym> hardware
1374	extensions.</para>
1375
1376      <para revision="273515">The &man.virtio.console.4; driver has
1377	been added, which provides an interface to VirtIO console
1378	devices through a &man.tty.4; device.</para>
1379
1380      <para revision="279957">The &man.bhyve.8; hypervisor has been
1381	updated to support <literal>DSM TRIM</literal> commands for
1382	virtual <acronym>AHCI</acronym> disks.</para>
1383
1384      <para revision="281439" arch="arm">Support for the
1385	<application>QEMU</application> <literal>virt</literal> system
1386	has been added.</para>
1387
1388      <para revision="282212" contrib="sponsor" sponsor="&msostc;">The
1389	Hyper-V&trade; drivers have been updated with several
1390	enhancements:</para>
1391
1392      <itemizedlist>
1393	<listitem>
1394	  <para>The &man.hv.vmbus.4; driver now has multi-channel
1395	    support.</para>
1396	</listitem>
1397
1398	<listitem>
1399	  <para>The &man.hv.storvsc.4; driver now has scatter/gather
1400	    support, in addition to performance improvements.</para>
1401	</listitem>
1402
1403	<listitem>
1404	  <para>The &man.hv.kvp.4; driver has received several bug
1405	    fixes.</para>
1406	</listitem>
1407      </itemizedlist>
1408
1409      <para revision="282274">Support for &man.xen.4; para-virtualized
1410	<literal>domU</literal> kernels has been removed.</para>
1411
1412      <para revision="284746" contrib="sponsor" sponsor="&msostc;">The
1413	&man.hv.netvsc.4; driver has been updated to support checksum
1414	offloading and <acronym>TSO</acronym>.</para>
1415
1416      <para revision="286062">The &man.xen.4; driver has been updated
1417	to include support for <literal>blkif</literal> indirect
1418	segment I/O.</para>
1419    </sect2>
1420
1421    <sect2 xml:id="hardware-arm">
1422      <title>ARM Support</title>
1423
1424      <para revision="260921">The &man.nand.4; device is enabled for
1425	ARM devices by default.</para>
1426
1427      <para revision="266943" arch="arm">Support for the Exynos 5420
1428	Octa system has been added.</para>
1429
1430      <para revision="267390" arch="arm">The <acronym>SMP</acronym>
1431	option has been enabled for all Exynos 5 systems supported by
1432	&os;.</para>
1433
1434      <para revision="268838" arch="arm">Support for the Toradex
1435	Apalis i.MX6 development board has been added.</para>
1436
1437      <para revision="273264" arch="armv6">An issue that could cause
1438	instability when detecting <acronym>SD</acronym> cards on the
1439	Raspberry Pi <acronym>SOC</acronym> has been fixed.</para>
1440
1441      <para revision="275963">The <literal>bcm2835_cpufreq</literal>
1442	driver has been added, which supports <acronym>CPU</acronym>
1443	frequency and voltage control on the Raspberry Pi
1444	<acronym>SOC</acronym>.</para>
1445
1446      <para revision="277042" arch="arm">Support to turn off the
1447	BeagleBone Black system with the &man.shutdown.8;
1448	<literal>-p</literal> flag or by invoking &man.poweroff.8; has
1449	been added.</para>
1450
1451      <para revision="277644" arch="arm">Audio transmission drivers
1452	have been added for Digital Audio Multiplexer
1453	(<acronym>AUDMUXM</acronym>), Smart Direct Memory Access
1454	Controller (<acronym>SDMA</acronym>), and Syncronous Serial
1455	Interface (<acronym>SSI</acronym>).</para>
1456
1457      <para revision="280259" contrib="sponsor" sponsor="&ff;">Initial
1458	support for the ARM AArch64 architecture has been
1459	added.</para>
1460
1461      <para revision="282779" arch="arm">Kernel support for Thumb-2
1462	userland has been added.</para>
1463
1464      <para revision="282827">Support for the hardware power button
1465	on the BeagleBone Black system has been added.</para>
1466
1467      <para revision="284273" contrib="sponsor"
1468	sponsor="&ff;">Initial
1469	<acronym>ACPI</acronym> support has been added for
1470	&os;/&arch.arm64;.</para>
1471
1472      <para revision="287225">Support for 1-Wire devices has been
1473	added, providing support for 1-Wire hardware through
1474	&man.gpio.4;.  See &man.ow.4;, &man.owc.4;, and
1475	&man.ow.temp.4; for more information.</para>
1476
1477      <para revision="287371" arch="arm64" contrib="sponsor"
1478	sponsor="&abt;">Support for the HiSilicon HI6220 SoC has been
1479	added.</para>
1480    </sect2>
1481  </sect1>
1482
1483  <sect1 xml:id="storage">
1484    <title>Storage</title>
1485
1486    <para>This section covers changes and additions to file systems
1487      and other storage subsystems, both local and networked.</para>
1488
1489    <sect2 xml:id="storage-general">
1490      <title>General Storage</title>
1491
1492      <para revision="278037" contrib="sponsor" sponsor="&ix;">The
1493	&man.ctl.4; <acronym>LUN</acronym> mapping has been rewritten,
1494	replacing <acronym>iSCSI</acronym>-specific mapping mechanisms
1495	with a new mechanism that works for any port.</para>
1496
1497      <para revision="278354" contrib="sponsor" sponsor="&ix;">The
1498	&man.ctld.8; utility has been updated to allow controlling
1499	non-<acronym>iSCSI</acronym> &man.ctl.4; ports.</para>
1500
1501      <para revision="275681" contrib="sponsor" sponsor="&ff;">The
1502	&man.autofs.5; subsystem has been updated to include a new
1503	&man.auto.master.5; map, <literal>-media</literal>, which
1504	allows automatically mounting removable media, such as
1505	<acronym>CD</acronym> drives or <acronym>USB</acronym> flash
1506	drives.</para>
1507
1508      <para revision="279955" contrib="sponsor" sponsor="&ff;">The
1509	&man.autofs.5; subsystem has been updated to include a new
1510	&man.auto.master.5; map, <literal>-noauto</literal>, which
1511	handles &man.fstab.5; entries set to
1512	<literal>noauto</literal>.</para>
1513
1514      <para revision="286444">The <acronym>GELI</acronym> class has
1515	been updated to support the <literal>BIO_DELETE</literal>
1516	&man.g.bio.9; <literal>bio_cmd</literal> field, providing
1517	<acronym>TRIM</acronym>/<acronym>UNMAP</acronym> support on
1518	<acronym>GELI</acronym>-backed <acronym>SSD</acronym> storage
1519	providers.</para>
1520
1521      <para revision="300880" contrib="sponsor" sponsor="&spectralogic;">
1522	Leading spaces are now stripped off <acronym>SCSI</acronym> disk serial
1523	numbers when populating the CAM serial number. This affects the output of
1524	&man.diskinfo.8; and the names of <filename>/dev/diskid/DISK-*</filename>
1525	device nodes, among other things.</para>
1526
1527    </sect2>
1528
1529    <sect2 xml:id="storage-net">
1530      <title>Networked Storage</title>
1531
1532      <para revision="270096" contrib="sponsor" sponsor="&ff;">The new
1533	filesystem automount facility, &man.autofs.5;, has been added.
1534	The new &man.autofs.5; facility is similar to that found in
1535	other &unix;-like operating systems, such as OS&nbsp;X&trade;
1536	and Solaris&trade;.  The &man.autofs.5; facility uses
1537	a &sun;-compatible &man.auto.master.5; configuration file, and
1538	is administered with the &man.automount.8; userland utility,
1539	and the &man.automountd.8; and &man.autounmountd.8;
1540	daemons.</para>
1541
1542      <para revision="273849" contrib="sponsor" sponsor="&ff;">Support
1543	for the <literal>timeo</literal>, <literal>actimeo</literal>,
1544	<literal>noac</literal>, and <literal>proto</literal> options
1545	have been added to &man.mount.nfs.8;.</para>
1546    </sect2>
1547
1548    <sect2 xml:id="storage-zfs">
1549      <title>ZFS</title>
1550
1551      <para revision="275748">The <literal>arc_meta_limit</literal>
1552	statistics are now visible through the
1553	<literal>kstat</literal> &man.sysctl.8;.  As a result of this
1554	change, the <literal>vfs.zfs.arc_meta_used</literal>
1555	&man.sysctl.8; has been removed, and replaced with the
1556	<literal>kstat.zfs.misc.arcstats.arc_meta_used</literal>
1557	&man.sysctl.8;.</para>
1558
1559      <para revision="287099" contrib="sponsor"
1560	sponsor="&clusterhq;">The &man.zfs.8; <literal>l2arc</literal>
1561	code has been updated to take <literal>ashift</literal> into
1562	account when gathering buffers to be written to the
1563	<literal>l2arc</literal> device.</para>
1564
1565      <para revision="300906" contrib="sponsor"
1566	sponsor="&ix;, &spectralogic;">The zfsd daemon has been added,
1567	which manages hotspares and replements in drive slots that publish
1568	physical paths.</para>
1569    </sect2>
1570
1571    <sect2 xml:id="storage-geom">
1572      <title>&man.geom.4;</title>
1573
1574      <para revision="267359">Support for the
1575	<literal>disklabel64</literal> partitioning scheme has been
1576	added to &man.gpart.8;.</para>
1577
1578      <para revision="282465">Support for the
1579	<literal>apple-boot</literal>, <literal>apple-hfs</literal>,
1580	and <literal>apple-ufs</literal> <acronym>MBR</acronym>
1581	partitioning schemes have been added to &man.gpart.8;.</para>
1582
1583      <para revision="285594" contrib="sponsor"
1584	sponsor="&scaleengine;">The &man.gpart.8; utility has been
1585	updated to include a new attribute for <acronym>GPT</acronym>
1586	partitions, <literal>lenovofix</literal>, which when set,
1587	which works around <acronym>BIOS</acronym> compatibility
1588	issues reported on several Lenovo&nbsp;&trade; laptops.</para>
1589    </sect2>
1590  </sect1>
1591
1592  <sect1 xml:id="boot">
1593    <title>Boot Loader Changes</title>
1594
1595    <para>This section covers the boot loader, boot menu, and other
1596      boot-related changes.</para>
1597
1598    <sect2 xml:id="boot-loader">
1599      <title>Boot Loader Changes</title>
1600
1601      <para revision="258431" contrib="sponsor" sponsor="&ff;">The
1602	memory test run at boot time on &os;/&arch.amd64; platforms
1603	has been disabled by default.</para>
1604
1605      <para revision="262955">A new &man.ttys.5; class,
1606	<literal>3wire</literal>, has been added.  This is similar to
1607	the existing terminal classes, but does not have a defined
1608	baudrate.</para>
1609
1610      <para revision="274085">The &man.vt.4; driver has been made the
1611	default system console driver.  The &man.syscons.4; driver is
1612	still available, and can be enabled by adding
1613	<literal>kern.vty=sc</literal> in &man.loader.conf.5;.
1614	Alternatively, &man.syscons.4; can be enabled at boot time by
1615	entering <literal>set kern.vty=sc</literal> at the
1616	&man.loader.8; prompt.</para>
1617
1618      <para revision="279950">Support for <literal>bzipfs</literal>
1619	has been added to the <acronym>EFI</acronym> loader.</para>
1620
1621      <para revision="281616">The boot loader has been updated to
1622	support entering the <acronym>GELI</acronym> passphrase before
1623	loading the kernel.  To enable this behavior, add
1624	<literal>geom_eli_passphrase_prompt="YES"</literal> to
1625	&man.loader.conf.5;.</para>
1626
1627      <para revision="284683" contrib="sponsor" sponsor="&ff;"
1628	arch="arm">The &man.ttys.5; file for &os;/&arch.arm; has been
1629	updated to enable <filename>ttyu1</filename>,
1630	<filename>ttyu2</filename>, and <filename>ttyu3</filename> by
1631	default, if the callin port is an active console port.</para>
1632    </sect2>
1633
1634    <sect2 xml:id="boot-menu">
1635      <title>Boot Menu Changes</title>
1636
1637      <para>&nbsp;</para>
1638    </sect2>
1639  </sect1>
1640
1641  <sect1 xml:id="network">
1642    <title>Networking</title>
1643
1644    <para>This section describes changes that affect networking in
1645      &os;.</para>
1646
1647    <sect2 xml:id="network-protocols">
1648      <title>Network Protocols</title>
1649
1650      <para revision="263140">Support for the IPX network transport
1651	protocol has been removed, and will not be supported in
1652	&os;&nbsp;11 and later releases.</para>
1653
1654      <para revision="272720" contrib="sponsor"
1655	sponsor="&limelight;">Support for <acronym>PLPMTUD</acronym>
1656	blackhole detection (<acronym>RFC</acronym> 4821) has been
1657	added to the &man.tcp.4; stack, disabled by default.  New
1658	control tunables have been added:</para>
1659
1660      <informaltable frame="none" pgwide="0">
1661	<tgroup cols="2">
1662	  <colspec colwidth="1*"/>
1663	  <colspec colwidth="1*"/>
1664	  <thead>
1665	    <row>
1666	      <entry>Tunable</entry>
1667	      <entry>Description</entry>
1668	    </row>
1669	  </thead>
1670
1671	  <tbody>
1672	    <row>
1673	      <entry><literal>net.inet.tcp.pmtud_blackhole_detection</literal></entry>
1674	      <entry>Enables or disables <acronym>PLPMTUD</acronym>
1675		blackhole detection</entry>
1676	    </row>
1677
1678	    <row>
1679	      <entry><literal>net.inet.tcp.pmtud_blackhole_mss</literal></entry>
1680	      <entry><acronym>MSS</acronym> to try for IPv4</entry>
1681	    </row>
1682
1683	    <row>
1684	      <entry><literal>net.inet.tcp.v6pmtud_blackhole_mss</literal></entry>
1685	      <entry><acronym>MSS to try for IPv6</acronym></entry>
1686	    </row>
1687	  </tbody>
1688	</tgroup>
1689      </informaltable>
1690
1691      <para>New monitoring &man.sysctl.8;s haven been added:</para>
1692
1693      <informaltable frame="none" pgwide="0">
1694	<tgroup cols="2">
1695	  <colspec colwidth="1*"/>
1696	  <colspec colwidth="1*"/>
1697	  <thead>
1698	    <row>
1699	      <entry>Tunable</entry>
1700	      <entry>Description</entry>
1701	    </row>
1702	  </thead>
1703
1704	  <tbody>
1705	    <row>
1706	      <entry><literal>net.inet.tcp.pmtud_blackhole_activated</literal></entry>
1707	      <entry>Number of times the code was activated to attempt
1708		downshifting the <acronym>MSS</acronym></entry>
1709	    </row>
1710
1711	    <row>
1712	      <entry><literal>net.inet.tcp.pmtud_blackhole_min_activated</literal></entry>
1713	      <entry>Number of times the blackhole
1714		<acronym>MSS</acronym> was used in an attempt to
1715		downshift</entry>
1716	    </row>
1717
1718	    <row>
1719	      <entry><literal>net.inet.tcp.pmtud_blackhole_failed</literal></entry>
1720	      <entry>Number of times that the blackhole failed to
1721		connect after downshifting the
1722		<acronym>MSS</acronym></entry>
1723	    </row>
1724	  </tbody>
1725	</tgroup>
1726      </informaltable>
1727
1728      <para revision="280971" contrib="sponsor"
1729	sponsor="&netflix;, &nginx;">Support for <acronym>IP</acronym>
1730	identification for atomic datagrams (<acronym>RFC</acronym>
1731	6864) has been added.  Support for this feature can be toggled
1732	with the <literal>net.inet.ip.rfc6864</literal>
1733	&man.sysctl.8;, which is enabled by default.</para>
1734
1735      <para revision="285336" contrib="sponsor"
1736	sponsor="&netgate;">The <acronym>IPSEC</acronym> has been
1737	updated to include support for <acronym>AES</acronym> modes on
1738	both software-only and hardware-backed (&man.aesni.4;)
1739	systems.</para>
1740
1741      <para revision="287798" contrib="sponsor" sponsor="&dell;">The
1742	network stack has been updated to fix handling of
1743	<acronym>IPv6</acronym> On-Link redirects.</para>
1744
1745	<para revision="300240">The net.inet.tcp.ecn.enable sysctl mib has been
1746	changed from a binary off/on control to a three way setting.</para>
1747
1748      <informaltable frame="none" pgwide="0">
1749	<tgroup cols="2">
1750	  <colspec colwidth="1*"/>
1751	  <colspec colwidth="1*"/>
1752	  <thead>
1753	    <row>
1754	      <entry>Value</entry>
1755	      <entry>Description</entry>
1756	    </row>
1757	  </thead>
1758
1759	  <tbody>
1760	    <row>
1761	      <entry><literal>0</literal></entry>
1762	      <entry>Totally disable ECN.</entry>
1763	    </row>
1764
1765	    <row>
1766	      <entry><literal>1</literal></entry>
1767	      <entry>Enable ECN if incoming connections request it. Outgoing
1768	      connections will request ECN.</entry>
1769	    </row>
1770
1771	    <row>
1772	      <entry><literal>2</literal></entry>
1773	      <entry>Enable ECN if incoming connections request it. Outgoing
1774	      conections will not request ECN.</entry>
1775	    </row>
1776
1777	  </tbody>
1778	</tgroup>
1779      </informaltable>
1780
1781      <para revision="300779">Dummynet AQM, an independent implementation of
1782      CoDel and FQ-CoDel for ipfw/dummynet has been imported to the base
1783      system.</para>
1784
1785    </sect2>
1786  </sect1>
1787
1788  <sect1 xml:id="ports">
1789    <title>Ports Collection and Package Infrastructure</title>
1790
1791    <para>This section covers changes to the &os;&nbsp;Ports
1792      Collection, package infrastructure, and package maintenance and
1793      installation tools.</para>
1794
1795    <sect2 xml:id="ports-infrastructure">
1796      <title>Infrastructure Changes</title>
1797
1798      <para>&nbsp;</para>
1799    </sect2>
1800
1801    <sect2 xml:id="ports-packages ">
1802      <title>Packaging Changes</title>
1803
1804      <para>&nbsp;</para>
1805    </sect2>
1806  </sect1>
1807
1808  <sect1 xml:id="doc">
1809    <title>Documentation</title>
1810
1811    <para>This section covers changes to the &os;&nbsp;Documentation
1812      Project sources and toolchain.</para>
1813
1814    <sect2 xml:id="doc-sources">
1815      <title>Documentation Source Changes</title>
1816
1817      <para>&nbsp;</para>
1818    </sect2>
1819
1820    <sect2 xml:id="doc-toolchain">
1821      <title>Documentation Toolchain Changes</title>
1822
1823      <para>&nbsp;</para>
1824    </sect2>
1825  </sect1>
1826
1827  <sect1 xml:id="releng">
1828    <title>Release Engineering and Integration</title>
1829
1830    <para>This section convers changes that are specific to the
1831      &os;&nbsp;Release Engineering processes.</para>
1832
1833    <sect2 xml:id="releng-changes">
1834      <title>Integration Changes</title>
1835
1836      <para revision="277458" contrib="sponsor" sponsor="&ff;">The
1837	Release Engineering build tools have been updated to include
1838	support for producing virtual machine disk images for various
1839	cloud hosting providers.</para>
1840
1841      <para revision="278926">The Release Engineering build tools have
1842	been updated to use multi-threaded &man.xz.1;.  By default,
1843	the number of &man.xz.1; threads is set to the number of cores
1844	available.</para>
1845
1846      <para revision="281802" contrib="sponsor" sponsor="&ff;">The
1847	Release Engineering build tools have been updated to include
1848	support for building &os;/&arch.arm64; virtual machine and
1849	memory stick installation images.</para>
1850
1851      <para revision="282693" contrib="sponsor" sponsor="&ff;">The
1852	Release Engineering build tools have been updated to support
1853	building &os;/&arch.arm; images without external utilities for
1854	supported boards where a corresponding
1855	<literal>u-boot</literal> port exists in the Ports
1856	Collection.</para>
1857
1858      <para revision="283307" contrib="sponsor" sponsor="&ff;">The
1859	&os;/&arch.i386; memory stick installation images are now
1860	created using the &man.mkimg.1; utility, matching the way
1861	the &os;/&arch.amd64; images are created.</para>
1862    </sect2>
1863  </sect1>
1864</article>
1865