Simpler forum authorization

[cl8n]

I wanted to look into replacing phpbb forum auth soon (as mentioned by lots of comments saying "this is temporary" etc), but I'm not sure which features are needed

a comment says that user-specific ACLs are no longer used but I don't have info beyond that. I think all i'd need is a list of the permission types still in use and whether or not "roles" are necessary anymore

[peppy]

One prerequisite for this is to turn off the old forums, i believe. And I think we are actually ready to do this.

As for roles, we still do have forum-group specific roles (ie support team with help forum access) so we'd likely need to consider that. A table with group_id, forum_id and then a number of bool columns for specific permissions may be enough

[peppy]

cc/ @nanaya in case he can think of any edge cases or special requirements i may have missed.

[cl8n]

by roles I meant AuthRoles which seem to give global permissions for usergroups. to my knowledge all of this is already taken care of by OsuAuthorize so I think we can get rid of it?

[nanaya]

Some checks in OsuAuthorize still use old forum acl.

[peppy]

This can be reconsidered now, if there is interest. Removing ACL completely would be a huge step forward.