Corresponds as closely as possible to the rules in #mafia on irc.xkcd.com
#mafia-4: http://www.epicmafia.com/lobby/setup/25750
#mafia-5: http://www.epicmafia.com/lobby/setup/25751
#mafia-6: http://www.epicmafia.com/lobby/setup/25752
(Note that 6-player #mafia is slightly different from this EM version: In #mafia, mort-like finds out role of nightkill at daybreak automatically)