glob: merge from glibc with Zanella glob changes

glob: merge from glibc with Zanella glob changes

Merge glob from glibc, with changes for glob proposed
by Adhemerval Zanella in the thread starting here:
https://sourceware.org/ml/libc-alpha/2017-08/msg01079.html
plus some fixes for this merge.
* lib/flexmember.h: Change license wording to something that
works unchanged in Glibc, since this code might be used in
Glibc and this will minimize 'diff' output.
* lib/glob_internal.h, lib/glob_pattern_p.c, lib/globfree.c:
New files, ported from glibc.
* lib/glob_pattern_p.c, lib/globfree.c, lib/glob.c [!_LIBC]:
Include <config.h> first.
* lib/glob-libc.h (_Restrict_): Remove.  All uses replaced
with __restrict.
(__size_t): Remove.  All uses replaced by size_t.
(size_t): Define by defining __need_size_t and including <stddef.h>.
This should work even in non-glibc platforms, where any name
pollution is OK.
Use __USE_MISC instead of __USE_BSD || __USE_GNU.
(struct stat64): Don’t worry about __GLOB_GNULIB.
(glob, globfree, glob_pattern_p): Remove macros for
__USE_FILE_OFFSET64 && __GNUC__ < 2 && !defined __GLOB_GNULIB
case.  Remove _GL_ARG_NONNULL as GNU behavior is to accept NULL
but set errno.
* lib/glob.c (_GL_ARG_NONNULL) [!_LIBC]: Remove.  All uses
removed since the glibc behavior works on null pointers.
Do not include stdio.h; old SunOS is irrelevant now.
Do not worry about GLOB_ONLY_P as we now mimic glibc here.
Include glob_internal.h.
(D_INO_TO_RESULT): Depend on (_LIBC || D_INO_IN_DIRENT), not
((POSIX || WINDOWS32) && !__GNU_LIBRARY__).  The latter probably
worked only coincidentally.
(attribute_hidden, __attribute_noinline__, __glibc_unlikely):
Remove macros; now done in glob.in.h.
(size_add_wrapv): Do not use __builtin_add_overflow if __ICC.
(glob): Properly initialize glob structure with
GLOB_BRACE|GLOB_DOOFFS (bug 20707).
Remove old code using SHELL since Bash no longer
uses this.
(glob, prefix_array): Separate MS code better.
(glob, glob_in_dir): Use C99 decls before statements when glibc
does.
(glob_in_dir): Remove old Amiga and VMS code.
(globfree, __glob_pattern_type, __glob_pattern_p): Move to
separate files.
* lib/glob.in.h (attribute_hidden, __attribute_noinline__)
(__glibc_unlikely):
Move here from glob.c.
(__restrict): New macro here, replacing the _Restrict_ in glob.c.
(weak_alias): New macro.
(__size_t): Remove.  All uses replaced by size_t.
* modules/d-ino (License): Now LGPLv2+, for compatibility with glob.
* modules/flexmember (License): Now LGPLv2+, which it should have
been anyway since flexmember.h is not unlimited-license.
* modules/glob (Files): Add +lib/glob_internal.h,
lib/glob_pattern_p.c, lib/globfree.c.
(Depends-on): Remove snippet/arg-nonnull.