[devel] Revise references to zlib-libpng license
diff --git a/scripts/makefile.os2 b/scripts/makefile.os2
index c250445..f716c3f 100644
--- a/scripts/makefile.os2
+++ b/scripts/makefile.os2
@@ -1,7 +1,8 @@
 # makefile for libpng on OS/2 with gcc
 #
 # This code is released under the zlib-libpng license.
-# For conditions of distribution and use, see copyright notice in png.h
+# For conditions of distribution and use, see copyright notice, disclaimer,
+# and license in png.h
 
 # Related files: pngos2.def