/newgame: Will save the current world to <server>/hitoc/backup_<timestamp>.zip (Or not if you disable this in the config), and delete all of the current worlds (world, world_nether, world_the_end). Will then kill the server.
/resetdeathmark: Unmarks all current worlds from death, as forgetting the fact that someone once died in your worlds and stop forcing joiners into spectator mode.
Configuration
lowHealthWarningThreshold: Once a player goes below the hp configured here, a message will be broadcasted to all players letting them know someone is in a pinch. 0 to disable.
backupWorldsOnNewGame: Should create a backup of the worlds on /newgame?
forceSpectatorOnNewJoin: If a world has been marked with death (Someone died), should new joiners be forced into spectator mode?