ispunct_l: New module. * lib/ctype.in.h: (ispunct_l): New declaration. * lib/ispunct_l.c: New file. * m4/ispunct_l.m4: New file. * m4/ctype_h.m4 (gl_CTYPE_H): Test for ispunct_l. (gl_CTYPE_H_REQUIRE_DEFAULTS): Initialize GNULIB_ISPUNCT_L. (gl_CTYPE_H_DEFAULTS): Initialize HAVE_ISPUNCT_L. * modules/ctype-h (Makefile.am): Substitute GNULIB_ISPUNCT_L, HAVE_ISPUNCT_L. * modules/ispunct_l: New file. * tests/test-ctype-h-c++.cc: Check declaration of ispunct_l. * doc/posix-functions/ispunct_l.texi: Mention the new module.