VOL-4926 - godownloader no longer available.

Makefile
makefiles/include.mk
makefiles/commands/kail.mk
--------------------
  o Refactor Makefile to reduce content.
  o Move defauilt makefile librarie includes into makefiles/include.mk
  o Move kail target dependency into makefiles/commands/kail.
  o Add 'kail' as a phony target to simplify installation use.

etc/godownloader.sh
-------------------
  o Inline a stub "copyright ccyy" to short-circuit lint-license checking.

Misc
----
  o Update copyright notices to +2023

Change-Id: I8d9bff6f1b535991cc7d100f28c1821f6bca2964
diff --git a/makefiles/lint/license/include.mk b/makefiles/lint/license/include.mk
index 61b0cfb..a88f0ba 100644
--- a/makefiles/lint/license/include.mk
+++ b/makefiles/lint/license/include.mk
@@ -1,6 +1,6 @@
 # -*- makefile -*-
 # -----------------------------------------------------------------------
-# Copyright 2022 Open Networking Foundation
+# Copyright 2022-2023 Open Networking Foundation (ONF) and the ONF Contributors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.