Improve cookie based session backend docs.
Note the don't require sessions to be in installed apps.
|@@ -120,6 +120,13 @@ and the :setting:`SECRET_KEY` setting.|
|+ When using cookies-based sessions :mod:`django.contrib.sessions` can be|
|+ removed from :setting:`INSTALLED_APPS` setting because data is loaded|
|+ from the key itself and not from the database, so there is no need for the|
|+ creation and usage of ``django.contrib.sessions.models.Session`` table.|
|It's recommended to leave the :setting:`SESSION_COOKIE_HTTPONLY` setting|