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

Polish up the tests a bit more after projects/collation was merged to head

Provide more meaningful diagnostic messages if LC_CTYPE can't be set properly
instead of segfaulting, because setlocale returns NULL and strcmp(NULL, b) will
always segfault

Split up the testcases so one failing (in this case en_US.ISO8859-15) won't
cause the rest of the testcases to be skipped

Remove some unused variables

MFC after: 1 week
X-MFC with: r290532
Sponsored by: EMC / Isilon Storage Division

Integrate tools/regression/lib/libc/locale into the FreeBSD test suite
as lib/libc/tests/locale

MFC after: 1 week
Sponsored by: EMC / Isilon Storage Division

Add libiconv based versions of *c16*() and *c32*().

I initially thought wchar_t was locale independent, but this seems to be
only the case on Linux. This means that we cannot depend on the *wc*()
routines to implement *c16*() and *c32*(). Instead, use the Citrus
libiconv that is part of libc.

I'll see if there is anything I can do to make the existing functions
somewhat useful in case the system is built without libiconv in the
nearby future. If not, I'll simply remove the broken implementations.

Reviewed by: jilles, gabor

Add <uchar.h>.

The <uchar.h> header, part of C11, adds a small number of utility
functions for 16/32-bit "universal" characters, which may or may not be
UTF-16/32. As our wchar_t is already ISO 10646, simply add light-weight
wrappers around wcrtomb() and mbrtowc().

While there, also add (non-yet-standard) _l functions, similar to the
ones we already have for the other locale-dependent functions.

Reviewed by: theraven