[devel] Revise references to zlib-libpng license
diff --git a/pngset.c b/pngset.c
index 071b026..27e8368 100644
--- a/pngset.c
+++ b/pngset.c
@@ -7,7 +7,8 @@
* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)
*
* 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
*
* The functions here are used during reads to store data from the file
* into the info struct, and during writes to store application data