New modules 'at-internal', 'openat-h', split off from module 'openat'.

New modules 'at-internal', 'openat-h', split off from module 'openat'.

* m4/openat.m4 (gl_FUNC_OPENAT): Don't set GNULIB_OPENAT. Don't
invoke gl_PREREQ_OPENAT and gl_MODULE_INDICATOR.
* modules/openat (Description): Add reference to POSIX function.
(Files): Remove lib/openat.h, lib/openat-proc.c.
(Depends-on): Add at-internal, openat-h. Remove fdopendir, gettext-h,
intprops, unistd.
(configure.ac): Remove AC_LIBOBJ of openat-proc. Invoke
gl_PREREQ_OPENAT, gl_MODULE_INDICATOR here. Invoke
gl_FCNTL_MODULE_INDICATOR.
(Include): Remove unistd.h, openat.h.
* modules/areadlinkat (Files): Add lib/at-func.c.
(Depends-on): Add at-internal, dosname, errno, extensions, fchdir,
openat-die, openat-h, save-cwd.
* modules/areadlinkat-with-size (Files): Add lib/at-func.c.
(Depends-on): Add at-internal, dosname, errno, extensions, fchdir,
openat-die, openat-h, save-cwd, unistd.
* modules/faccessat (Files): Add lib/at-func.c, lib/openat-priv.h.
(Depends-on): Add at-internal, dosname, errno, fchdir, openat-die,
openat-h, save-cwd. Remove fcntl-h, openat.
* modules/fchmodat (Files): Remove lib/openat.h.
(Depends-on): Add at-internal, openat-h. Remove dirent, fcntl-h,
openat, stdbool, unistd.
* modules/fchownat (Files): Remove lib/openat.h.
(Depends-on): Add at-internal, openat-h. Remove dirent, fcntl-h,
openat, stdbool, sys_stat.
* modules/fdopendir (Files): Remove lib/openat-priv.h,
lib/openat-proc.c.
(Depends-on): Add at-internal.
(condigure.ac): Remove AC_LIBOBJ of openat-proc.
* modules/fstatat (Files): Remove lib/openat.h.
(Depends-on): Add at-internal, openat-h. Remove dirent, openat,
stdbool, unistd.
* modules/fts (Depends-on): Add openat-h.
* modules/linkat (Depends-on): Add at-internal, openat-h. Remove
openat.
* modules/mkdirat (Files): Remove lib/openat.h.
(Depends-on): Add at-internal, openat-h. Remove dirent, fcntl-h,
openat, stdbool, sys_stat.
* modules/mkfifoat (Files): Add lib/at-func.c.
(Depends-on): Add at-internal, dosname, errno, fchdir, openat-die,
openat-h, save-cwd. Remove fcntl-h, openat.
* modules/openat-die (Depends-on): Add openat-h. Remove openat.
* modules/readlinkat (Files): Add lib/at-func.c.
(Depends-on): Add at-internal, dosname, errno, fchdir, openat-die,
openat-h, save-cwd. Remove fcntl-h, openat.
* modules/renameat (Depends-on): Add at-internal, openat-h. Remove
openat.
* modules/selinux-at (Files): Add lib/at-func.c.
(Depends-on): Add at-internal, dosname, errno, extensions, fchdir,
fcntl-h, openat-die, openat-h, save-cwd, unistd. Remove openat.
* modules/symlinkat (Files): Add lib/at-func.c.
(Depends-on): Add at-internal, dosname, errno, fchdir, openat-die,
openat-h, save-cwd. Remove fcntl-h, openat.
* modules/unlinkat (Files): Remove lib/openat.h.
(Depends-on): Add at-internal, openat-h. Remove dirent, openat,
stdbool.
* modules/utimensat (Files): Add lib/at-func.c.
(Depends-on): Add at-internal, dosname, errno, fchdir, fcntl-h,
openat-die, openat-h, save-cwd.
* modules/fchownat-tests (Depends-on): Add openat-h. Remove openat.
* modules/fdutimensat-tests (Depends-on): Add openat.
* modules/fstatat-tests (Depends-on): Add openat-h.
* modules/readlinkat-tests (Depends-on): Add openat.
* modules/symlinkat-tests (Depends-on): Add openat.