fix fight club => v0.4

disallow towel inside ring

kill on exit

replace killer var with duel_killer

remove nosave

trigger restart on enable/disable

remove accept/decline notification

fix ring x2 and y2

forbid betsanc and asorm

fix password var in debug

allow random passwords

handle all effects

do not accept if not present

fix rules

check map too

warp randomly on death

fallthrough if no acceptable requests

use bitmasking instead of modulo

remove resave

simplify goback

do not re-declare randompassword