[PATCH] docs: Document the various management commands available

[Thomas Monjalon]

30/05/2017 17:15, Stephen Finucane:
> As requested.
> 
> Signed-off-by: Stephen Finucane <stephen at that.guru>
> Reported-by: Thomas Monjalon <thomas.monjalon at 6wind.com>
> Closes-bug: #77

Thanks Stephen

> +   ./manage.py cron
> +
> +Run periodic Patchwork functions: send notifications and expire unused users.
> +
> +This is required to ensure notifications emails are actually sent to users that
> +request them. For more information on integration of this script, refer to the
> +:ref:`deployment installation guide <deployment-cron>`.

And "expiring unused users" allows to clean up the fake users from spambots.