Option to make mob attack all monsters

I think there should be a ln "EntityMonster" option when choosing which mobs should the mob attack.

This way we wouldn't have to make long lists of monsters just to make the mob act similarly to an iron golem or a snow golem. And it would also be compatible with other mods.

Also, there should be an option to mark this kind of mobs as "utility mobs" because the game thinks that they are aggressive monsters and let iron golems attack them.