file
$File: COPYING,v  1.2 2018/09/09 20:33:28 christos Exp $
  Copyright (c) Ian  F. Darwin 1986, 1987, 1989, 1990, 1991, 1992, 1994, 1995.
  Software written  by Ian F. Darwin and others;
  maintained 1994-  Christos Zoulas.
This software is  not subject to any export provision of the United States
  Department of  Commerce, and may be exported to any country or planet.
Redistribution and  use in source and binary forms, with or without
  modification, are  permitted provided that the following conditions
  are met:
  1. Redistributions  of source code must retain the above copyright
  notice immediately at the beginning of the  file, without modification,
  this list of conditions, and the following  disclaimer.
  2. Redistributions  in binary form must reproduce the above copyright
  notice, this list of conditions and the  following disclaimer in the
  documentation and/or other materials  provided with the distribution.
THIS SOFTWARE IS  PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  ANY EXPRESS OR  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  IMPLIED WARRANTIES  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  ARE DISCLAIMED. IN  NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  ANY DIRECT,  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  DAMAGES  (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  OR SERVICES; LOSS  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  HOWEVER CAUSED AND  ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  LIABILITY, OR TORT  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  OUT OF THE USE OF  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  SUCH DAMAGE.
