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out of date.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/plugins.rst b/doc/source/plugins.rst
index 282c1a4..b4136c4 100644
--- a/doc/source/plugins.rst
+++ b/doc/source/plugins.rst
@@ -8,8 +8,8 @@
Extras.d Hooks
~~~~~~~~~~~~~~
-These relatively new hooks are an extension of the existing calls from
-``stack.sh`` at the end of its run, plus ``unstack.sh`` and
+These hooks are an extension of the service calls in
+``stack.sh`` at specific points in its run, plus ``unstack.sh`` and
``clean.sh``. A number of the higher-layer projects are implemented in
DevStack using this mechanism.