If you modify libpng you may insert additional notices immediately following
this sentence.
-libpng version 1.2.6, September 12, 2004, is
-Copyright (c) 2004 Glenn Randers-Pehrson, and is
+libpng versions 1.2.6, August 15, 2004, through 1.2.20, September 8, 2007, are
+Copyright (c) 2004, 2006-2007 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
certification mark of the Open Source Initiative.
Glenn Randers-Pehrson
-glennrp@users.sourceforge.net
-September 12, 2004
+glennrp at users.sourceforge.net
+September 8, 2007