Recreating ctype-extra.c with additional 5.1
  charset, and with additional missing 5.0 charset
  due to bug with too small buffer MAX_BUF.


strings/ctype-extra.c:
  Recreating ctype-extra.c with additional 5.1
  charset, and with additional missing 5.0 charset
  due to bug with too small buffer MAX_BUF.