Revert r330897:

This was intended to be a non-functional change. It wasn't. The commit
message was thus wrong. In addition it broke arm, and merged crypto
related code.

Revert with prejudice.

This revert skips files touched in r316370 since that commit was since
MFCed. This revert also skips files that require $FreeBSD$ property
changes.

Thank you to those who helped me get out of this mess including but not
limited to gonzo, kevans, rgrimes.

Requested by: gjb (re)

Partial merge of the SPDX changes

These changes are incomplete but are making it difficult
to determine what other changes can/should be merged.

No objections from: pfg

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

libc: spelling fixes.

Mostly on comments.

return "US-ASCII" instead of "POSIX" for "C" and "POSIX" locales
as it used to be in previous version of the locales. Returning
"POSIX" has too many fallouts.

nl_langinfo: Simplify case ladder

The NONE:US-ASCII case isn't necessary. The "NONE:" case will handle
US-ASCII, so let's remove the redundant handling.

Submitted by: marino
Obtained from: DragonflyBSD

locales: Enforce US-ASCII encoding (limited to 7-bit)

The US-ASCII format was getting treated identically to POSIX. It is
supposed to throw an ILSEQ errno if a value of 0x80 or greater is
encountered, so let's bring back the "ASCII" handling.

While here, change nl_codeset to return US-ASCII only when the encoding
really is "US-ASCII". Before "C" and "POSIX" encoding returned this
string, so now they return "POSIX".

Discussed with: ache
Submitted by: marino
Obtained from: DragonflyBSD

Improve collation string and locales support

Merge collation support from Illumos and DragonflyBSD.

Locales are now generated with the new localedef(1) tool from CLDR POSIX files.
The generated files are now identified as "BSD 1.0" format.

The libc now only read "BSD 1.0" locales definitions, all other version will be
set to "C"
The localedef(1) tool has been imported from Illumos and modified to use tree(3)
instead of the CDDL avl(3)
A set of tool created by edwin@ and extended by marino@ for dragonfly has been
added to be able to generate locales and the Makefiles from the vanilla CLDR
unicode databases + a universal UTF-8 charmap (by marino@)
Update the locales to unicode v27
Given our regex(3) does not support multibyte (yet) it has been forced to always
use locale C
Remove now unused colldef(1) and mklocale(1)
Finish implementing the numeric BSD extension for ctypes
The number of supported locales has grown from 175 to 250 locales. Among the new
locales: 6 Arabic locales (AE EG JO MA QA SA), Different variations of spanish
locales.
Added new 3 components locales for mn_Cyrl_MN, sr_Cyrl_RS sr_Latn_RS,
zh_Hans_CN, zh_Hant_HK and zh_Hant_TW. Some aliases has been for 2 components
version when possible.

Thanks: Garrett D'Amore (Illumos) who made sure all his work was done under
BSD license!, Edwin Groothuis (edwin@) for the work he made on tools to be able
to generate locales definition usable in freebsd sources out of vanilla CLDR
definitions, John Marino (DragonflyBSD) who first merge the Illumos work into
Dragonfly and spent hours tracking down bugs.

Implement xlocale APIs from Darwin, mainly for use by libc++. This adds a
load of _l suffixed versions of various standard library functions that use
the global locale, making them take an explicit locale parameter. Also
adds support for per-thread locales. This work was funded by the FreeBSD
Foundation.

Please test any code you have that uses the C standard locale functions!

Reviewed by: das (gdtoa changes)
Approved by: dim (mentor)

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

. style(9)
. fix/add comments (to cover changes done thru last 20 months)
. extend monetary testcase to cover int_* values

Remove transition period hack

Fix the style of the SCM ID's.
I believe have made all of libc .c's as consistent as possible.

* Add my e-mail to copyrights
* style(9)'ify

Return "" if reallocf() fails

Add transition period hack allowing old locale names return proper codeset too

Handle "ASCII" and "US-ASCII" aliases

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

Actually implement T_FMT_AMPM

cleanup commentaries

CRNCYSTR: determine '.' too

Implement CRNCYSTR

Return {YES,NO}STR from locale

Approved by: phantom

Implement CODESET

Back out attempt to implement CRNCYSTR - require additional prefixes according
to SUSV2. Add comment explaining it instead.

Explicitly mark deprecated entries.
Return currency_symbol for CRNCYSTR
Return "%r" for T_FMT_AMPM
Remove obsoleted comment about c_fmt
Return "" for {YES,NO}STR

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