realloc-gnu: Replace module with an alias to realloc-posix.

* tests/test-realloc-posix.c: Renamed from tests/test-realloc-gnu.c. Add
more tests, not yet activated.
* modules/realloc-posix-tests: Renamed from modules/realloc-gnu-tests.
Test test-realloc-posix instead of test-realloc-gnu.
* modules/realloc-gnu: Mark as a deprecated alias of 'realloc-posix'.
* lib/stdlib.in.h (realloc): Ignore GNULIB_REALLOC_GNU.
* modules/stdlib (Makefile.am): Don't substitute GNULIB_REALLOC_GNU,
REPLACE_REALLOC_FOR_REALLOC_GNU.
* m4/stdlib_h.m4 (gl_STDLIB_H_REQUIRE_DEFAULTS): Don't initialize
GNULIB_REALLOC_GNU.
(gl_STDLIB_H_DEFAULTS): Don't initialize
REPLACE_REALLOC_FOR_REALLOC_GNU.
* m4/realloc.m4 (gl_FUNC_REALLOC_GNU): Remove macro.
* m4/malloc.m4 (gl_CHECK_MALLOC_POSIX): Update comment.
* doc/posix-functions/realloc.texi: Remove description of module
'realloc-gnu'.
* MODULES.html.sh (Memory management functions <stdlib.h>): Remove
realloc-gnu. Add realloc-posix.

modules/realloc-gnu

@@ -1,22 +1,18 @@
 Description:
 realloc() function that is glibc compatible.
 
+Status:
+deprecated
+
+Notice:
+This module is deprecated. Use the module 'filename' instead.
+
 Files:
-lib/realloc.c
 
 Depends-on:
 realloc-posix
-extensions-aix
-free-posix           [test $REPLACE_REALLOC_FOR_REALLOC_GNU = 1]
-malloc-gnu           [test $REPLACE_REALLOC_FOR_REALLOC_GNU = 1]
-xalloc-oversized     [test $REPLACE_REALLOC_FOR_REALLOC_GNU = 1]
 
 configure.ac:
-gl_FUNC_REALLOC_GNU
-if test $REPLACE_REALLOC_FOR_REALLOC_GNU = 1; then
-  AC_LIBOBJ([realloc])
-fi
-gl_STDLIB_MODULE_INDICATOR([realloc-gnu])
 
 Makefile.am:
 
@@ -27,4 +23,4 @@ License:
 LGPLv2+
 
 Maintainer:
-Jim Meyering
+all