* m4/setlocale.m4 (gl_FUNC_SETLOCALE): Set REPLACE_SETLOCALE also on
Cygwin 1.5.x.
* doc/posix-functions/setlocale.texi: Mention that the problem with the
LC_CTYPE category also exists on Cygwin 1.5.x.
* lib/setlocale.c (rpl_setlocale): On native Windows, when setlocale
succeeds but sets LC_CTYPE to "C", report a failure.
* tests/test-setlocale2.sh: New file.
* tests/test-setlocale2.c: New file.
* modules/setlocale-tests (Files): Add the new files.
(Makefile.am): Enable test-setlocale2.sh test.
* doc/posix-functions/setlocale.texi: Mention workaround.
* lib/locale.in.h (setlocale): New declaration.
* lib/setlocale.c: New file, based on
gettext/gettext-runtime/intl/setlocale.c.
* m4/setlocale.m4: New file.
* m4/locale_h.m4 (gl_LOCALE_H): Test whether setlocale is declared.
(gl_LOCALE_H_DEFAULTS): Initialize GNULIB_SETLOCALE, REPLACE_SETLOCALE.
* modules/locale (Makefile.am): Substitute GNULIB_SETLOCALE,
REPLACE_SETLOCALE.
* modules/setlocale: New file.
* tests/test-locale-c++.cc: Test the declaration of setlocale.
* doc/posix-functions/setlocale.texi: Mention the new module.