Bugfix: BuildingPrivlidge(sic) - add GetOrUpdateProtectedMinutes that's MT safe and does a bit of a cheeky If we end up sending this entity to many players in 1 frame, it will update the cached protected minutes only for 1 player, and the rest are in limbo if they got old or new value. This gives us same perf as original lazy-eval solution. Tests: TestMTSave - got 0 fails!