[ChangeLog]

[ChangeLog]
* modules/mkstemp (Depends-on): Add extensions, so that
mkstemp is visible on some platforms.
(Makefile.am): Add mkstemp.h to EXTRA_DIST.
[lib/ChangeLog]
* mkstemp.h: New file, since some standard headers
#define mkstemp.
* mkstemp.c: Revamp to put the !_LIBC code together.
Include "mkstemp.h".
Make the _LIBC code resemble glibc original more,
e.g., use K&R style.
* stdlib--.h: Include mkstemp.h.
[m4/ChangeLog]
* mkstemp.m4 (gl_FUNC_MKSTEMP): Require AC_SYS_LARGEFILE.
Check that large offsets work.  Modernize Autoconf usages.
Prefer "yes" to mean a good thing rather than a bad.
Don't put "#define mkstemp" in config.h, as this might interfere
with standard system headers that "#define mkstemp mkstemp64".