Pass through the rest of the docs

Do the link cleanups and update a handful of things that were
out of date.

Change-Id: I758027bf3577c66cfb13df963516823a5c247080
diff --git a/doc/source/overview.rst b/doc/source/overview.rst
index e3cf75d..4078240 100644
--- a/doc/source/overview.rst
+++ b/doc/source/overview.rst
@@ -73,7 +73,7 @@
 (Heat)
 
 Additional services not included directly in DevStack can be tied in to
-``stack.sh`` using the `plugin mechanism <plugins.html>`__ to call
+``stack.sh`` using the :doc:`plugin mechanism <plugins>` to call
 scripts that perform the configuration and startup of the service.
 
 Node Configurations