* config/srclist.txt: Add glibc bug 1237.

* config/srclist.txt: Add glibc bug 1237.
* lib/regcomp.c, lib/regex_internal.c, lib/regex_internal.h:
* lib/regexec.c:
All uses of recently-renamed identifiers changed to use the new,
POSIX-compliant names.  The code will build and run just fine
without these changes, but it's better to eat our own dog food
and use the standard-conforming names.
* m4/regex.m4 (gl_REGEX): Use POSIX-compliant spellings when testing
for GNU regex features.