Add cdif-license, which was alread referred to by textproc/cdif/Makefile


(apb)

cdif: word context diff

Copyright (c) 1992-1998 Kazumasa Utashiro <utashiro@iij.ad.jp>
Internet Initiative Japan Inc.
3-13 Kanda Nishiki-cho, Chiyoda-ku, Tokyo 101-0054, Japan

$rcsid = q#Id: cdif,v 1.15 1999/02/03 13:14:20 utashiro Exp #;
Original: 1992/03/11

Redistribution for non-commercial purpose, with or without
modification, is granted as long as all copyright notices are
retained.  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES ARE DISCLAIMED.