If you modify libpng you may insert additional notices immediately following
this sentence.
-libpng versions 1.0.7, July 1, 2000, through 1.2.5rc3, September 18, 2002, are
-Copyright (c) 2000-2002 Glenn Randers-Pehrson
-and are distributed according to the same disclaimer and license as libpng-1.0.6
+This code is released under the libpng license.
+
+libpng versions 1.2.6, August 15, 2004, through 1.6.2, April 25, 2013, are
+Copyright (c) 2004, 2006-2012 Glenn Randers-Pehrson, and are
+distributed according to the same disclaimer and license as libpng-1.2.5
+with the following individual added to the list of Contributing Authors
+
+ Cosmin Truta
+
+libpng versions 1.0.7, July 1, 2000, through 1.2.5 - October 3, 2002, are
+Copyright (c) 2000-2002 Glenn Randers-Pehrson, and are
+distributed according to the same disclaimer and license as libpng-1.0.6
with the following individuals added to the list of Contributing Authors
Simon-Pierre Cadieux
certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
-randeg@alum.rpi.edu
-September 18, 2002
+glennrp at users.sourceforge.net
+April 25, 2013