[VOL-5009] - Create a v2.12 release notes page.

overview/releases.rst
release_notes/index.rst
release_notes/voltha_2.12.rst
-----------------------------
  o Create a skeleton release notes area for v2.12

Change-Id: Ia74075131326e0254af236d9c9edbdf8f46fa430
diff --git a/makefiles/todo.mk b/makefiles/todo.mk
index b122a9e..f788724 100644
--- a/makefiles/todo.mk
+++ b/makefiles/todo.mk
@@ -24,6 +24,11 @@
 ## -----------------------------------------------------------------------
 todo ::
 	@echo '[TODO]'
+	@echo '  CLEANUP: make test'
+	@echo '    WARNING: document isnt included in any toctree'
+	@echo
+	@echo '  CLEANUP: make linkcheck'
+	@echo '    replace redirect URLs with resolved urls'
 
 ## -----------------------------------------------------------------------
 ## -----------------------------------------------------------------------