Copyright 1995-2020 by Alexander Lehmann <lehmann@usa.net>,
                          Andreas Dilger <adilger@enel.ucalgary.ca>,
                          Glenn Randers-Pehrson <randeg@alum.rpi.edu>,
                          Greg Roelofs <newt@pobox.com>,
                          John Bowler <jbowler@acm.org>,
                          Tom Lane <tgl@sss.pgh.pa.us>

   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.  This software is provided "as is" without express or
   implied warranty.


[This license applies to pngcheck.c and its associated makefiles and
 documentation in the main directory.  The files in the "gpl" subdirectory--
 specifically, pngsplit.c and png-fix-IDAT-windowsize.c--are licensed under the
 GNU General Public License.  The files in "amiga" subdirectory are Copyright
 2003 Simon Goodwin and were contributed without an explicit license statement,
 but insofar as the "gpl" subdirectory didn't exist at the time, it's safe to
 assume their intended license was similar to pngcheck's, just with Simon's
 copyright replacing the one above.]