Manually calculate horses' jump power due to horse jumping being moved clientside

nms-patches/EntityHorse.patch

@@ -99,12 +99,18 @@
          AttributeInstance attributeinstance = this.getAttributeMap().a("Speed");
  
          if (attributeinstance != null) {
-@@ -1145,6 +1168,12 @@
+@@ -1145,6 +1168,18 @@
      }
  
      public void b(int i) {
 +        // CraftBukkit start
-+        org.bukkit.event.entity.HorseJumpEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callHorseJumpEvent(this, this.jumpPower);
++        float power;
++        if (i >= 90) {
++            power = 1.0F;
++        } else {
++            power = 0.4F + 0.4F * (float) i / 90.0F;
++        }
++        org.bukkit.event.entity.HorseJumpEvent event = org.bukkit.craftbukkit.event.CraftEventFactory.callHorseJumpEvent(this, power);
 +        if (event.isCancelled()) {
 +            return;
 +        }