Updating copyrights
New format: 'Copyright .year-present Open Networking Laboratory'
Change-Id: I1a9e58b355b775e75245ad875a2d7a4df3f03098
diff --git a/tools/dev/header.txt b/tools/dev/header.txt
index 6c18c92..79e6e7f 100644
--- a/tools/dev/header.txt
+++ b/tools/dev/header.txt
@@ -1,4 +1,4 @@
-Copyright $today.year Open Networking Laboratory
+Copyright $today.year-present Open Networking Laboratory
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.