strcase: Move AC_LIBOBJ invocations to module description. * m4/strcase.m4 (gl_FUNC_STRNCASECMP): Set HAVE_STRNCASECMP. (gl_FUNC_STRCASECMP, gl_FUNC_STRNCASECMP): Call AC_CHECK_FUNCS instead of AC_REPLACE_FUNCS. Move AC_LIBOBJ, gl_PREREQ_STRCASECMP, gl_PREREQ_STRNCASECMP invocations from here... * modules/strcase (configure.ac): ... to here.