Copyright (C) 2001 Yasna.com. All rights reserved.
 
  ===================================================================
  The Apache Software License, Version 1.1
 
  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, 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.
 
  3. The end-user documentation included with the redistribution,
     if any, must include the following acknowledgment:
        "This product includes software developed by
         Yasna.com (http://www.yasna.com)."
     Alternately, this acknowledgment may appear in the software itself,
     if and wherever such third-party acknowledgments normally appear.
 
  4. The names "Yazd" and "Yasna.com" must not be used to
     endorse or promote products derived from this software without
     prior written permission. For written permission, please
     contact yazd@yasna.com.
 
  5. Products derived from this software may not be called "Yazd",
     nor may "Yazd" appear in their name, without prior written
     permission of Yasna.com.
 
  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 YASNA.COM OR
  ITS 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.
  ====================================================================
 
  This software consists of voluntary contributions made by many
  individuals on behalf of Yasna.com. For more information
  on Yasna.com, please see http://www.yasna.com.