/* 
 *  Copyright (C) 1989 by the Massachusetts Institute of Technology
 * 
 *    Export of software employing encryption from the United States of
 *    America is assumed to require a specific license from the United
 *    States Government.  It is the responsibility of any person or
 *    organization contemplating export to obtain such a license before
 *    exporting.
 * 
 * WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
 * distribute this software and its documentation for any purpose and
 * without fee is hereby granted, provided that the above copyright
 * notice appear in all copies and that both that copyright notice and
 * this permission notice appear in supporting documentation, and that
 * the name of M.I.T. not be used in advertising or publicity pertaining
 * to distribution of the software without specific, written prior
 * permission.  M.I.T. makes no representations about the suitability of
 * this software for any purpose.  It is provided "as is" without express
 * or implied warranty.
 */