CODESET support. okay millert@, otto@

(not really useful for now, it mostly helps some programs which want
to use it, it will become useful when we have full 16 bits locale).

src/include/langinfo.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: langinfo.h,v 1.4 2002/02/16 21:27:17 millert Exp $	*/
+/*	$OpenBSD: langinfo.h,v 1.5 2005/11/16 16:48:14 espie Exp $	*/
 /*	$NetBSD: langinfo.h,v 1.3 1995/04/28 23:30:54 jtc Exp $	*/
 
 /*
@@ -69,6 +69,8 @@
 #define NOEXPR		49	/* Negative response for yes/no queries */
 #define CRNCYSTR	50	/* Currency symbol */
 
+#define CODESET		51	/* Codeset name */
+
 __BEGIN_DECLS
 char *nl_langinfo(nl_item);
 __END_DECLS