sys: Remove $FreeBSD$: two-line .h pattern

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/

spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD

The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch
up to that fact and revert to their recommended match of BSD-2-Clause.

Discussed with: pfg
MFC After: 3 days
Sponsored by: Netflix

sys/sys: further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.

sys/sys: minor spelling fixes.

While the changes are minor, these headers are very visible.

MFC after: 2 weeks

Fix improper handling of variadic args with ICDEBUG

PR: kern/168095
Submitted by: gcooper

Add unicode support to msdosfs and smbfs; original pathes from imura,
bug fixes by Kuan-Chung Chiu <buganini at gmail dot com>.

Tested by me in production for several days at work.

A new jail(8) with a configuration file, to replace the work currently done
by /etc/rc.d/jail.

Switch to our preferred 2-clause BSD license.

Approved by: bp

Split tolower/toupper code from usual xlat16 kiconv table, and make it
possible to do tolower/toupper independently without code conversion.

Submitted by: imura (but bugs are mine)
Obtained from: http://people.freebsd.org/~imura/kiconv/
(1_kiconv_wctype_kern.diff, 1_kiconv_wctype_user.diff)

- Import the HEAD csup code which is the basis for the cvsmode work.

Fix panic when loading libiconv.ko on sparc64.
It seems that this issue only become obvious when compiled with -O2
on sparc64.

Since each struct iconv_converter_class has been initialized by
DEFINE_CLASS macro, not all members of struct iconv_converter_class
has been allocated on memory and cc_link member has not been
initialized, while iconv_register_converter() wanted to access it
with TAILQ.
Now we modify KICONV_CONVERTER macro and fix this bug.

Problem reported on: freebsd-sparc64
Pointed out by: yongari
Discussed with: yongari
Tested by: yongari
MFC after: 3 days

Switch Unicode charset name from "ISO-10646-UCS-2" to "UTF-16BE".
Using ISO-10646-UCS-2 will cause a problem when we use our own
iconv functions in the future, or port iconv other than GNU
libiconv.

Each vendors treat "UCS-2" as follows, and endian issue is
vendor specific:

- Solaris 8 iconv
Little Endian with BOM

- HP-UX iconv
Big Endian

- NetBSD/i386 1.6 iconv
Little Endian

- GNU libiconv
Big Endian

- glibc(RedHat AS 2.1 x86) iconv
Little Endian

- IANA
Name: ISO-10646-UCS-2
MIBenum: 1000
Source: the 2-octet Basic Multilingual Plane, aka Unicode
this needs to specify network byte order: the standard
does not specify (it is a 16-bit integer space)
Alias: csUnicode

- MSDN
Little Endian
http://msdn.microsoft.com/library/en-us/cpref/html/frlrfsystemtextencodingclassgetencodingtopic2.asp

Now using UTF-16BE is harmless, because
- same as UCS-2 with 2 byte range (U+0000 - U+FFFF)
- kernel code of each file systems(cd9660, msdosfs, ntfs) believes
Unicode is a 2 byte character at this time.
- UDF has only 2 byte range of Unicode filenames.
- It's defined at RFC2781.

So I believe it's time to change before starting new RELENG_6. :)

Approved by: re (scottl)

Fix kiconv on the 64bit plathomes.

- Correct idxp pointer to point the properly address of the
each array of the kiconv character conversion tables,
so that character conversion work properly when file
systems are mounted with kiconv options.

- The definition of ICONV_CSMAXDATALEN was also bogus
because it was defined as if all machines were 32bit
computers.

Tested on: amd64
MFC after: 1 month

/* -> /*- for license, minor formatting changes

Make msdosfs long filenames matching case insensitive again.

PR: 59765
Submitted by: Ryuichiro Imura <imura@ryu16.org>

Include module.h

Submitted by: imura@ryu16.org

- Support for multibyte charsets in LIBICONV.
- CD9660_ICONV, NTFS_ICONV and MSDOSFS_ICONV kernel options
(with corresponding modules).
- kiconv(3) for loadable charset conversion tables support.

Submitted by: Ryuichiro Imura <imura@ryu16.org>

Convert GNU variadic macros to the ISO 9X variety.

The previous ANSIfication did not take into account earlier,
non-compliant compilers. Revert to the compatible form to allow
upgrade-builds.

ANSIfy variable-argument macros.

Update to C99, s/__FUNCTION__/__func__/.

Add function prototypes and base module for kernel side iconv library.
Add simple "xlat" converter which performs 8to8 table based conversion.
Unicode converter will be added in the near future.

Reviewed by: silence on arch@
Files placement reviewed by: bde
Obtained from: smbfs