[devel] Mention zlib-libpng license in each source file
diff --git a/scripts/makefile.freebsd b/scripts/makefile.freebsd
index f4ab737..de0b625 100644
--- a/scripts/makefile.freebsd
+++ b/scripts/makefile.freebsd
@@ -1,5 +1,7 @@
 # makefile for libpng under FreeBSD
 # Copyright (C) 2002, 2007, 2009 Glenn Randers-Pehrson and Andrey A. Chernov
+#
+# This code is released under the zlib-libpng license.
 # For conditions of distribution and use, see copyright notice in png.h
 
 PREFIX?=        /usr/local