VOL-4840 - Tracking ticket for release documentation.

conf.py
-------
  o Define more external link macros to shorten URLs.

Misc
----
  o Updated comments on version strings and misc items.

Change-Id: Ib4bc650e575bdc4b5c6a666c4147c8b93a41e797
diff --git a/howto/release/components/onos_dependencies.rst b/howto/release/components/onos_dependencies.rst
index 2d0d8c8..5068cd3 100644
--- a/howto/release/components/onos_dependencies.rst
+++ b/howto/release/components/onos_dependencies.rst
@@ -151,3 +151,12 @@
 .. code:: XML
 
    <sadis.api.version>5.10.0</sadis.api.version>
+
+maclearner
+^^^^^^^^^^
+
+pppoeagent
+^^^^^^^^^^
+
+segmentrouting
+^^^^^^^^^^^^^^