With the role system finished the jail module has nothing legacy left in
it, so it moves to exp_scenario/module/control/jail.lua and the copy in
exp_legacy is removed. The module takes LuaPlayer only, requires a reason,
returns false rather than nil when there is nothing to do, and exposes its
event ids as Jail.on_player_jailed and Jail.on_player_unjailed in the same
shape as exp_util's selection events.
bbassie
2e53e4668d