Copyright (c) 1994 Board of Trustees, Leland Stanford Jr. University
  
   Redistribution and use in source and binary forms are permitted
   provided that the above copyright notice and this paragraph are
   duplicated in all such forms and that any documentation,
   advertising materials, and other materials related to such
   distribution and use acknowledge that the software was developed
   by Stanford University.  The name of the University may not be used 
   to endorse or promote products derived from this software without 
   specific prior written permission.
   THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
   IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
   WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.