NEW Added config option that only allows players to place keypads on fading doors
NEW Added configurable maximum linking distance
NEW Added permissions for those in OpenPermissions
FIX Fixed disabled map object permission check
FIX Fix keycard persistence error
FIX Keypad access table copying not working if spawnmenu hasn't been opened yet
FIX Keypads are now TRANSMIT_ALWAYS because reliable PVS networking is apparently difficult for gmod
