If you modify libpng you may insert additional notices immediately following
this sentence.
-libpng version 1.2.6, August 15, 2004, is
+libpng version 1.2.6, September 12, 2004, is
Copyright (c) 2004 Glenn Randers-Pehrson, and is
distributed according to the same disclaimer and license as libpng-1.2.5
with the following individual added to the list of Contributing Authors
Glenn Randers-Pehrson
glennrp@users.sourceforge.net
-August 15, 2004
+September 12, 2004