Remove two empty private namespaces. One was commented out anyway.

libc: Remove unused (and public) locale_isstrict()

The publicly exposed locale_isstrict function is not hooked into anything.
It was intended to implement LOCALE_STRICT environment variable handling

libc: Remove unused (and public) locale_isstrict()

The publicly exposed locale_isstrict function is not hooked into anything.
It was intended to implement LOCALE_STRICT environment variable handling,
but it only returns a boolean based on the value of LOCALE_STRICT, and not
even efficiently.

There is also a private "strict_mode" variable in locale_private.h that
apparently was intended to be used with LOCALE_STRICT, but it's also
seemingly useless.

The LOCALE_STRICT override still needs to be implemented if UTF-8B is
in use, but it can be handled at encoding initialization more
efficiently later.

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Fix libc symbol maps after build test

The following modifications (typos, bugs, missing symbols,
extra symbols) allows buildworld to complete with libc versioning
turned on (a first). After perform

Fix libc symbol maps after build test

The following modifications (typos, bugs, missing symbols,
extra symbols) allows buildworld to complete with libc versioning
turned on (a first). After performance verification via dports
bulk build, the versioning will be activated.

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More libc Symbol map refinements (nearing completion now)

Reworked (significantly) symbol map for locales

locale - Add two new API functions

* Add wcrtombin() and mbintowcr(), powerful buffer-to-buffer functions
to translate UTF8, which can also perform escaping and de-escaping,
allow legacy parsing

locale - Add two new API functions

* Add wcrtombin() and mbintowcr(), powerful buffer-to-buffer functions
to translate UTF8, which can also perform escaping and de-escaping,
allow legacy parsing, and do checks with varying levels of strictness.

NOTE: If no locale or "C" locale, these functions are 1:1 (do not do
UTF8 processing). A UTF8 locale must be used to access these
functions.

* Add wcrtoutf8() and utf8towcr(). These work exactly the same as
the above functions but are locale-agnostic. They always operate in
UTF8 and locale initialization is not necessary.

* Escaping and de-escaping for 8-bit-clean round-trips with two of the
modes.

* Can construct UTF8B from unescaped 8-bit-clean data, can deconstruct
UTF8B (restore the original clean data), and can also be flagged
generically to take already-escaped UTF8B or wchars as input.

* Can be used to perform strict checks.

* Very powerful incremental buffer validation and processing capabilities.
Far more visibility to the caller rather than hiding state in a tracking
state structure. No tracking state structure.

* Does not do idiotic nul buffer termination. Caller passes explicitly
sized data, can opt to include or not include a terminator (depending
on what is desired), and the byte buffers can contain any 8-bit code
including 0x00.

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libc/locale: Add __collate_equiv_value functionality

This function is required for TRE bracket equivalence support.

libc/locale: Revamp CTYPE support (from Illumos)

The LC_CTYPE format didn't change, but libc stills needs a revamp
to properly use the new LC_CTYPE files that localedef(2) generates.

collate 1/4: Add support for LC_COLLATE format "DragonFly 4.4" in libc

The collate functions within libc have been using version 1 and 1.2 of the
packed LC_COLLATE binary formats. These were genera

collate 1/4: Add support for LC_COLLATE format "DragonFly 4.4" in libc

The collate functions within libc have been using version 1 and 1.2 of the
packed LC_COLLATE binary formats. These were generated with the colldef
tool, but the new LC_COLLATE files are going to be generated by the new
localedef tool using CLDR POSIX files as input. The DragonFly-flavored
version of localedef identifies the format as "DragonFly 4.4". Any
LC_COLLATE file with a different version will simply not be loaded, and
all LC* categories will get set to "C" (aka "POSIX") locale.

This work is based off of Nexenta's contribution to Illumos (successor
to OpenSolaris). The integration with xlocale is my work though.

The following commits will enable localedef tool, disable the colldef
tool, add generated colldef directory, and finally remove colldef from
base.

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libc versioning: Add missing symbols, put rest in DFprivate_1_0

This builds, like the previous attempt, but all executables that pull in
libc segfault when errno is accessed, so libc versioning is n

libc versioning: Add missing symbols, put rest in DFprivate_1_0

This builds, like the previous attempt, but all executables that pull in
libc segfault when errno is accessed, so libc versioning is not working.

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libc version maps: Update inactive symbol maps

This is a work in progress, but it is encouraging that a full buildworld
completed with a versioned libc. This will not be activated until it is
verif

libc version maps: Update inactive symbol maps

This is a work in progress, but it is encouraging that a full buildworld
completed with a versioned libc. This will not be activated until it is
verified with a complete bulk run of packages.

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locales, libconv: Sync with FreeBSD (extensive reach)

What started out as a relatively simply upgrade to libiconv finally
resulted in a simultaneous overhaul to locales, strings, and stdio.
All of t

locales, libconv: Sync with FreeBSD (extensive reach)

What started out as a relatively simply upgrade to libiconv finally
resulted in a simultaneous overhaul to locales, strings, and stdio.
All of these are interdependent and there is no way to upgrade them
individually or in steps.

These cases are similar to what happened with libm where significant
syncing came from NetBSD previously, rendering contributions from
FreeBSD difficult. Libiconv and locales (both ancient) are now in
sync with FreeBSD HEAD.

As several headers were signficantly updated and the mtree was updated
to accommodate the new include/xlocale directory, this commit will
require a full world build. It also may cause some dports to no longer
build due to prototype differences, but the dports will be adjusted.

The regexp library was not being used. It was removed from FreeBSD four
years ago. Since it required collate updates, I took the opportunity to
remove it completely by adding re_comp functionality to 4.3 compat
library like FreeBSD did.

__DragonFly_version has been bumped to 500300.

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libc: Add symbol versions (not active)