The create-forums function has been replaced with an [update] subcommand
of [forums]. This new function tries its best to keep existing forum
objects, which is especially important once content has been created.
Forums are identified by their URL. Changing the URL means the forum
needs to be recreated. If the URL doesn't changed, metadata is updated
without removing topics and subforums in that forum.
* Improve the update model for forums in master.py
* Fix a typo in the prefix for the tool projects subforum
* Add the admin and assoc boards for permission testing