Soldiers don't affect karma

Added a TRUE pbDontDispose flag to soldiers. This is the flag the game uses to register 'special mobs' that shouldn't affect karma. Tested and confirmed.

This will also have the added benefit of allowing soldiers to build up around flagpoles to their natural limit of 4 per screen (they only appear in a handful of town-adjacent faction flagged areas so this shouldn't be a problem). The buildup will be very important, considering many players will now need to kill a bunch of soldiers for soldier shield rank due to the rank change. Running around waiting for one soldier to spawn is a pain, let alone when you need to kill 5-10.