Updated Infernalis reference link with reST label.
Signed-off-by: James McClune <jmcclune@mcclunetechnologies.net>
substituting ``{username}`` for the user name you define, describes how to
create a user with passwordless ``sudo``.
-.. note:: Starting with the `Infernalis release`_ the "ceph" user name is reserved
+.. note:: Starting with the :ref:`Infernalis release <infernalis-release-notes>`, the "ceph" user name is reserved
for the Ceph daemons. If the "ceph" user already exists on the Ceph nodes,
removing the user must be done before attempting an upgrade.