Merge branch 'stable-2.13'

* stable-2.13:
  Deprecate plugin

Change-Id: I7ef8248e455c44eaa8c461b5134a9e1d7e963a26
tree: 3e1ce086665a0e3a48c20be897324f8e5066e84e
  1. README-THIS-REPO-IS-DEPRECATED.txt