SPIGOT-709: Extend the block place limit to arm swings

CraftBukkit-Patches/0125-Limit-block-placement-interaction-packets.patch

@@ -61,4 +61,24 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              }
  
              flag = true;
+@@ -0,0 +0,0 @@ public class PlayerConnection implements PacketListenerPlayIn, IUpdatePlayerList
+     public void a(PacketPlayInArmAnimation packetplayinarmanimation) {
+         if (this.player.dead) return; // CraftBukkit
+         PlayerConnectionUtils.ensureMainThread(packetplayinarmanimation, this, this.player.u());
++        // Spigot start
++        boolean throttled = false;
++        if (lastPlace != -1 && packetplayinarmanimation.timestamp - lastPlace < 30 && packets++ >= 4) {
++            throttled = true;
++        } else if ( packetplayinarmanimation.timestamp - lastPlace >= 30 || lastPlace == -1 )
++        {
++            lastPlace = packetplayinarmanimation.timestamp;
++            packets = 0;
++        }
++        if (throttled) {
++            return;
++        }
++        // Spigot end
+         this.player.z();
+         // CraftBukkit start - Raytrace to look for 'rogue armswings'
+         float f1 = this.player.pitch;
 --