Allows changing the modifier for the piglin spawn chance from a portal block based on the world difficulty.
For example, with the default vanilla value of 2000 there is a 2 out of 2000 chance for a piglin to spawn in a portal block each tick in normal mode.
Equation: random.nextInt(modifier) < difficulty
Difficulties:
0 - peaceful
1 - easy
2 - normal
3 - hard
This lets us choose if farmland trampling is fully disabled or only players may trample farmland.
This lets us choose if entities can stop trampling if they fall a distance equal to their feather falling level, plus the extra block necessary to trample in the first place. Feather Falling 1 requires you to fall over 3+ blocks to trample. FF 2 requires 4+, etc.
Allows for Note Blocks to ignore whether or not there's air above them to play.
Normally, the sounds will only play when the block directly above is air.
With this patch enabled, players can place any block above the Note Block and it will still work.
