JZlib 0.0.* were released under the GNU LGPL license.  Later, we have switched 
over to a BSD-style license. 

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Copyright (c) 2000,2001,2002,2003 ymnk, JCraft,Inc. All rights reserved.

Redistribution and use in source and binary forms, with or without
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  1. Redistributions of source code must retain the above copyright notice,
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  2. Redistributions in binary form must reproduce the above copyright 
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     the documentation and/or other materials provided with the distribution.

  3. The names of the authors may not be used to endorse or promote products
     derived from this software without specific prior written permission.

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