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spdx: The BSD-2-Clause-FreeBSD identifier is obsolete, drop -FreeBSD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

include: General further adoption of SPDX licensing ID tags.

Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified 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.

langinfo.h: Hide YESSTR and NOSTR in strict POSIX mode.

YESSTR and NOSTR are obsolete and are only in old SUS.

Correctly expose xlocale functions if people include the headers in the wrong
order (as some ports apparently do).

Approved by: dim (mentor)

Reapply 227753 (xlocale cleanup), plus some fixes so that it passes build
universe with gcc.

Approved by: dim (mentor)

Revert r231673 and r231682 for now, until we can run a full make
universe with them. Sorry for the breakage.

Pointy hat to: me and brooks

Cleanup of xlocale:

- Address performance regressions encountered by das@ by caching per-thread
data in TLS where available.
- Add a __NO_TLS flag to cdefs.h to indicate where not available.
- Reorganise the xlocale.h definitions into xlocale/*.h so that they can be
included from multiple places.
- Export the POSIX2008 subset of xlocale when POSIX2008 says it should be
exported, independently of whether xlocale.h is included.
- Fix the bug where programs using ctype functions always assumed ASCII unless
recompiled.
- Fix some style(9) violations.

Reviewed by: brooks (mentor)
Approved by: dim (mentor)

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

Create the altix project branch. The altix project will add support
for the SGI Altix 350 to FreeBSD/ia64. The hardware used for porting
is a two-module system, consisting of a base compute module and a
CPU expansion module. SGI's NUMAFlex architecture can be an excellent
platform to test CPU affinity and NUMA-aware features in FreeBSD.

MFCs of r197764, r197765, r197766, r197847:

Modified locale(1) to be able to show the altmon_X fields and the
[cxX]_fmt's. Also modify the "-k list" option to display only
fields with a certain prefix.

Add the comment "(FreeBSD only)" to the altmonth_x keywords

Modified locale(1) to be able to show the altmon_X fields and the [cxX]_fmt's.
Also modify the "-k list" option to display only fields with a certain prefix.

MFC after: 1 week

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

o Don't include <nl_types.h>, instead provide a typedef for nl_item.
o Use relatively new visibility primitives to conditionalize some
constants.

Breath deep and take __P out of the system include files.

# This appears to not break X11, but I'm having problems compiling the
# glide part of the server with or without this patch, so I can't tell
# for sure.

* style(9)'ify
* add K&R support to langinfo.h

Requested by: bde (2)

Add my e-mail to copyrights

Add D_MD_ORDER (local extension) to get month/day order from locale

Add SUSv2 compatible nl_langinfo() function. It still need some work, but
this is already usable one.