Copy stable/11@r303970 to releng/11.0 as part of the 11.0-RELEASE
cycle.

Prune svn:mergeinfo from the new branch, and rename it to RC1.

Update __FreeBSD_version.

Use the quarterly branch for the default FreeBSD.conf pkg(8) repo and
the dvd1.iso packages population.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.
Prune svn:mergeinfo from the new branch, as nothing has been merged
here.

Additional commits post-branch will follow.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

A new implementation of the loader block cache

The block cache implementation in loader has proven to be almost useless, and in worst case even slowing down the disk reads due to insufficient cache size and extra memory copy.
Also the current cache implementation does not cache reads from CDs, or work with zfs built on top of multiple disks.
Instead of an LRU, this code uses a simple hash (O(1) read from cache), and instead of a single global cache, a separate cache per block device.
The cache also implements limited read-ahead to increase performance.
To simplify read ahead management, the read ahead will not wrap over bcache end, so in worst case, single block physical read will be performed to fill the last block in bcache.

Booting from a virtual CD over IPMI:
0ms latency, before: 27 second, after: 7 seconds
60ms latency, before: over 12 minutes, after: under 5 minutes.

Submitted by: Toomas Soome <tsoome@me.com>
Reviewed by: delphij (previous version), emaste (previous version)
Relnotes: yes
Differential Revision: https://reviews.freebsd.org/D4713

libstand: use NULL instead of zero for pointers.

Fix loader's ability to read the 10.1 release PowerPC ISOs. There appears to
be some kind of problem with the version of makefs used for these disks.
There may be a better way to handle this problem, so I've set the MFC
timer for a fairly long time period.

MFC after: 2 weeks

Add a divisor parameter to twiddle() so that callers can request that output
only happen on every Nth call. Update the existing twiddle() calls done in
various IO loops to roughly reflect the relative IO sizes. That is, tftp
and nfs call twiddle() on every 1K block, ufs on every filesystem block,
so the network calls now use a much larger divisor than disk IO calls.

Also add a new twiddle_divisor() function that allows an application to set
a global divisor that is applied on top of the per-call divisors. Nothing
calls this yet, but loader(8) will be using it to further throttle the
cursor for slow serial consoles.

Switch to ANSI function prototypes in a few places.
Get rid of some unused parameter warnings.

Implement the full range of ISO9660 number conversion routines in iso.h.

MFC after: 2 weeks

- Change the f_isdir field of struct file to be a flags field and two
new flags: F_ROOTDIR and F_RR (Rock Ridge present).
- Cache the SUSP LEN_SKP parameter in struct file as well.
- If we open() '/', then force a read of the directory's contents so we
can examine the directory record of '.' to see if Rock Ridge is present.
- If Rock Ridge extensions are present, lookup Rock Ridge names in
readdir().

- Add a simple SUSP parser.
- Use the SUSP parser to detect Rock Ridge (RRIP) extensions and to look
up alternate names when opening files.

Switch to using ANSI function declarations and add missing function
prototypes. I'm tired of getting stupid bugs from changing function
parameters and not getting warnings from the compiler when I goof it up.

Add __FBSDID()s to libstand

Bail if we go beyond the directory size, not just if we hit it.
Certain ISO fs's (like the one for 4.4-RC1 disc1 on alpha)
trigger this, and we end up opening a null file name. This causes us to get
a false match for "kernel.ko" when it does not exist.

fix cd9660 to work on files larger than ISO_DEFAULT_BLOCK_SIZE and unbreak
cdboot on alphas (which has been broken since just after 4.0-RELEASE)

submitted by: jlemon

Add a readdir function to the loader fsops vector, and implement the
functionality for some of the filesystesms.

trailing white space removal.

Add two new functions cd9660_readfile() & cd9660_readdir(), which
cd9660_read() now uses to read CDROMs. With these changes FreeBSD/Alpha
can now boot from a bootable CDROM.

Submitted by: dfr

Path arguments to *_open functions should be const, but we were mangling
them.

Submitted by: write-protected text segment in BTX

This commit was generated by cvs2svn to compensate for changes in r38451,
which included commits to RCS files with non-trunk default branches.

This is libstand; a support library for standalone executables (eg. bootstrap
modules).
Obtained from: NetBSD, with some architectural changes and many additions.