Updated from generate-devstack-plugins-list

Change-Id: I9078900f98721336daf1aab4a812eed96f8b1588

Author: OpenStack Proposal Bot

doc/source/plugin-registry.rst

@@ -1,23 +1,26 @@
 ..
-  Note to patch submitters: this file is covered by a periodic proposal
-  job.  You should edit the files data/devstack-plugins-registry.footer
-  data/devstack-plugins-registry.header instead of this one.
+
+  Note to patch submitters:
+
+  # ============================= #
+  # THIS FILE IS AUTOGENERATED !  #
+  # ============================= #
+
+  ** Plugins are found automatically and added to this list **
+
+  This file is created by a periodic proposal job.  You should not
+  edit this file.
+
+  You should edit the files data/devstack-plugins-registry.footer
+  data/devstack-plugins-registry.header to modify this text.
 
 ==========================
  DevStack Plugin Registry
 ==========================
 
-Since we've created the external plugin mechanism, it's gotten used by
-a lot of projects. The following is a list of plugins that currently
-exist. Any project that wishes to list their plugin here is welcomed
-to.
-
-Detected Plugins
-================
-
-The following are plugins that a script has found in the openstack/
-namespace, which includes but is not limited to official OpenStack
-projects.
+The following list is an automatically-generated collection of
+available DevStack plugins.  This includes, but is not limited to,
+official OpenStack projects.
 
 
 ====================================== ===