Configurable farmland trample height

This is _not_ in block height or an exact science. During my testing I found very inconsistent values for the fallDistance variable. Here are the results of those tests (https://imgur.com/BojltJF):

Value set -> Actual fall distance needed to trample
   1.0 -> 1.25
   1.5 -> 1.75
   2.0 -> 2.25
   2.5 -> 2.87
   3.0 -> 3.5
   3.5 -> 4.25
   4.0 -> 4.25
   4.5 -> 5.0
   5.0 -> 5.87
   5.5 -> 5.87

Author: BillyGalbreath

patches/server/0224-Configurable-farmland-trample-height.patch

@@ -1,5 +1,14 @@
 --- a/net/minecraft/world/level/block/FarmBlock.java
 +++ b/net/minecraft/world/level/block/FarmBlock.java
+@@ -112,7 +_,7 @@
+     public void fallOn(Level level, BlockState state, BlockPos pos, Entity entity, float fallDistance) {
+         super.fallOn(level, state, pos, entity, fallDistance); // CraftBukkit - moved here as game rules / events shouldn't affect fall damage.
+         if (level instanceof ServerLevel serverLevel
+-            && level.random.nextFloat() < fallDistance - 0.5F
++            && (serverLevel.purpurConfig.farmlandTrampleHeight >= 0D ? fallDistance >= serverLevel.purpurConfig.farmlandTrampleHeight : level.random.nextFloat() < fallDistance - 0.5F) // // Purpur - Configurable farmland trample height
+             && entity instanceof LivingEntity
+             && (entity instanceof Player || serverLevel.getGameRules().getBoolean(GameRules.RULE_MOBGRIEFING))
+             && entity.getBbWidth() * entity.getBbWidth() * entity.getBbHeight() > 0.512F) {
 @@ -129,6 +_,27 @@
                      return;
                  }

purpur-server/minecraft-patches/sources/net/minecraft/world/level/block/FarmBlock.java.patch

@@ -935,13 +935,15 @@ private void endCrystalSettings() {
     public boolean farmlandTramplingDisabled = false;
     public boolean farmlandTramplingOnlyPlayers = false;
     public boolean farmlandTramplingFeatherFalling = false;
+    public double farmlandTrampleHeight = -1D;
     private void farmlandSettings() {
         farmlandBypassMobGriefing = getBoolean("blocks.farmland.bypass-mob-griefing", farmlandBypassMobGriefing);
         farmlandGetsMoistFromBelow = getBoolean("blocks.farmland.gets-moist-from-below", farmlandGetsMoistFromBelow);
         farmlandAlpha = getBoolean("blocks.farmland.use-alpha-farmland", farmlandAlpha);
         farmlandTramplingDisabled = getBoolean("blocks.farmland.disable-trampling", farmlandTramplingDisabled);
         farmlandTramplingOnlyPlayers = getBoolean("blocks.farmland.only-players-trample", farmlandTramplingOnlyPlayers);
         farmlandTramplingFeatherFalling = getBoolean("blocks.farmland.feather-fall-distance-affects-trampling", farmlandTramplingFeatherFalling);
+        farmlandTrampleHeight = getDouble("blocks.farmland.trample-height", farmlandTrampleHeight);
     }
 
     public double floweringAzaleaGrowthChance = 0.0D;