VOL-4925 - Build and release components.

VERSION
-------
  o Bump version string for a release build.

makefiles
---------
  o Import more library based makefile logic.
  o Several lint targets added, disabled by default but can be used by name.
  o Removed pyenv dependency to support simple checking by shell iteration.

Misc
----
  o Bulk copyright notice update to 2023

Change-Id: I3a6668be96b3e03966f8fb72ceba72c0b947ba6e
diff --git a/tox.ini b/tox.ini
index 4bfe954..df5e505 100755
--- a/tox.ini
+++ b/tox.ini
@@ -1,4 +1,4 @@
-; Copyright 2019-present Open Networking Foundation
+; Copyright 2019-2023 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.