Settings updates, permanent spawn rate increase, logoff temp disable timer fix.

Updated the default settings values for: rescue/elusion teleport timer (2 minutes, down from 10) and various speedhack detection settings.

Decreased the default amount of time before a monster is spawned in monsroom.kod, so that the 100% setting in settings.kod will give a 50% increased spawn rate.

Fixed a calculation for the temporary suspension of logoff penalties enacted when the population drops (e.g. server crash, update) which was returning a very large number and causing overflow and a negative number to be returned.