loci: centralize copyright header
diff --git a/c_gen/templates/of_message.h b/c_gen/templates/of_message.h
index 77066bc..944f6d2 100644
--- a/c_gen/templates/of_message.h
+++ b/c_gen/templates/of_message.h
@@ -25,7 +25,7 @@
 :: # EPL for the specific language governing permissions and limitations
 :: # under the EPL.
 ::
-/* Copyright 2013, Big Switch Networks, Inc. */
+:: include('_copyright.c')
 
 /*
  * These routines manipulate a low level buffer assuming it holds