[master] add year range for copyright

COPYING

@@ -1,4 +1,4 @@
-Copyright (C) 2009  Internet Systems Consortium, Inc. ("ISC")
+Copyright (C) 2009-2014  Internet Systems Consortium, Inc. ("ISC")
 
 Permission to use, copy, modify, and/or distribute this software for any
 purpose with or without fee is hereby granted, provided that the above