[3755] Update copyright per reveiw

src/bin/d2/d2_messages.mes

@@ -1,4 +1,4 @@
-# Copyright (C) 2013-2014  Internet Systems Consortium, Inc. ("ISC")
+# Copyright (C) 2013-2015  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