Fix links

docs/source/configuration.rst

@@ -235,6 +235,8 @@ For each room on the server a query is made to fetch further details (e.g.
 features, number of occupants etc.), so on servers with many rooms this
 option will create lots of extra connection traffic.
 
+.. _`auto_login`:
+
 auto_login
 ----------
 

docs/source/setup.rst

@@ -306,8 +306,8 @@ If your web-application has access to the same credentials, it can send those
 credentials to Converse.js so that user's are automatically logged in when the
 page loads.
 
-This is can be done by setting `auto_login`_ to true and configuring the 
-the `credentials_url`_ setting.
+This is can be done by setting :ref:`auto_login` to true and configuring the 
+the :ref:`credentials_url` setting.
 
 Option 3). Temporary authentication tokens
 ------------------------------------------