Merge glibc changes into lib/glob.c.

Merge glibc changes into lib/glob.c.

* lib/glob.c (glob_in_dir): Sync with glibc/posix/glob.c, dated
2007-10-15 04:59:03 UTC.  Here are the changes:

2007-10-14  Ulrich Drepper  <drepper@redhat.com>

* lib/glob.c: Reimplement link_exists_p to use fstatat64.

* lib/glob.c: Add some branch prediction throughout.

2007-10-07  Ulrich Drepper  <drepper@redhat.com>

[BZ #5103]
* lib/glob.c (glob): Recognize patterns starting \/.

2007-02-14  Jakub Jelinek  <jakub@redhat.com>

[BZ #3996]
* lib/glob.c (attribute_hidden): Define if not defined.
(glob): Unescape dirname, filename or username when needed and not
GLOB_NOESCAPE.  Handle \/ correctly.  Handle GLOB_MARK if filename
is NULL.  Handle unescaped [ in pattern without closing ].
Don't pass GLOB_CHECK down to recursive glob for directories.
(__glob_pattern_type): New function.
(__glob_pattern_p): Implement using __glob_pattern_type.
(glob_in_dir): Handle GLOB_NOCHECK patterns containing no meta
characters and backslashes if not GLOB_NOESCAPE or unterminated [.
Remove unreachable code.

2006-09-30  Ulrich Drepper  <drepper@redhat.com>

* lib/glob.c (glob_in_dir): Add some comments and asserts to
explain why there are no leaks.

2006-09-25  Jakub Jelinek  <jakub@redhat.com>

[BZ #3253]
* lib/glob.c (glob_in_dir): Don't alloca one struct globlink at a
time, rather allocate increasingly bigger arrays of pointers, if
possible with alloca, if too large with malloc.

2007-10-16  Paul Eggert  <eggert@cs.ucla.edu>