returned by nl_langinfo(CODESET) in the C/POSIX locale

Index: libcharset/lib/localcharset.c
--- libcharset/lib/localcharset.c.orig
+++ libcharset/lib/localcharset.c
@@ -143,7 +143,7 @@ static const struct table_entry alias_table[] =
 #   define alias_table_defined
 #  endif
 #  if defined __OpenBSD__                                   /* OpenBSD */
-    { "646",        "ASCII" },
+    { "US-ASCII",   "ASCII" },
     { "ISO8859-1",  "ISO-8859-1" },
     { "ISO8859-13", "ISO-8859-13" },
     { "ISO8859-15", "ISO-8859-15" },