[Coding] Review all FLHook permissions checks

[Alex.]

Type: Coding
Bug: There's a repeated conversation every once in a while regarding staff who have FLHook Admin flags of some sort, but whom we are not prepared to grant the full "superadmin" admin rights traditionally reserved for people who have desk access (i.e. game server admins, lead developer, and certain senior Coding people). These are people such as moderators, developers, maybe trusted people running events, and historically Angels too. It would be nice to be able to take each separate command, or potentially a logical group of commands, and grant access to just those. Right now the FLHook codebase is littered with inappropriate RIGHT_SUPERADMIN checks. I would suggest that RIGHT_SUPERADMIN checks are appropriate in almost no cases that wouldn't be better served by the creation of a new right (bar maybe .setadmin itself).

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