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

Renumber clauses to reduce diffs to other versions

NetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3,
so follow suit to make comparison easier.

Add wcpcpy(3) and wcpncpy(3).

- Add getdelim(), getline(), stpncpy(), strnlen(), wcsnlen(),
wcscasecmp(), and wcsncasecmp().
- Make some previously non-standard extensions visible
if POSIX_VISIBLE >= 200809.
- Use restrict qualifiers in stpcpy().
- Declare off_t and size_t in stdio.h.
- Bump __FreeBSD_version in case the new symbols (particularly
getline()) cause issues with ports.

Reviewed by: standards@

Per Regents of the University of Calfornia letter, remove advertising
clause.

# If I've done so improperly on a file, please let me know.

Add an implementation of the semi-standard wcsdup() function, as found
on Microsoft and GNU systems.

Sync prototypes with <wchar.h> with respect to the restrict qualifier.

Fixed syntax errors in synopsis. The restrict keyword doesn't exist yet.
The corresponding bugs in <wchar.h> have no effect because the function
prototypes there don't have args so the __restrict "keyword" is
misinterpreted as an arg.

mdoc(7) police: Use the new .In macro for #include statements.

... but we do provide .St -isoC-99, and it is not required to have the
history info as:

: .Sh STANDARDS If the command, library function or file adheres to a
: specific implementation such as IEEE Std 1003.2
: (``POSIX.2'') or ANSI X3.159-1989 (``ANSI C'') this
: should be noted here. If the command does not adhere
: to any standard, its history should be noted in the
: HISTORY section.

adapt to FreeBSD.
- enable locale-insensitive functions of wchar.h:
wcscat.c wcschr.c wcscmp.c wcscpy.c wcscspn.c wcslcat.c wcslcpy.c
wcslen.c wcsncat.c wcsncmp.c wcsncpy.c wcspbrk.c wcsrchr.c wcsspn.c
wcsstr.c wmemchr.c wmemcmp.c wmemcpy.c wmemmove.c wmemset.c
XXX: wcswidth.c is not enabled yet.
- enable wmemchr(3) man page.
XXX: FreeBSD lacks .St -isoC99 and .St -isoC-amd1.

initial import of locale insensitive wcs* and wmem* functions.

Obtained from: NetBSD and Citrus.