Plugin for in-game permission management

[Hornwitser]

It's possible to restrict the actions players can take in the game via /permissions command in-game. This can be accessed from the Lua API via the game.permissions object. It would be useful when hosting a public cluster to be able to centrally manage the permissions of players.

This should come in the form of a plugin that can define the available permission groups the permissions granted by them and which permission group each user/player is member of. This can then be synced with all instances the permission management is enabled for.