1. don't delete protected nodes, 2. time out in loaded chunks, 3. don't crash when dying in certain nodes (like default doors or sign_lib signs)

This adds protection for furnaces (when the area is protected, so it the
furnace).
Also made the codes a bit shorter..

These changes allow players to punch up old bones or their own.
If there is no area for bones, drop the items instead of delete.
Notify the player where he died, so he can find them again.