Drop Leads from nether portals - Fixes #3226

Spigot-Server-Patches/0492-Fix-numerous-item-duplication-issues-and-teleport-is.patch

@@ -16,7 +16,7 @@ So even if something NEW comes up, it would be impossible to drop the
 same item twice because the source was destroyed.
 
 diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
-index 0a7e4449407104fe6c0ff7d00bd1f32eb074e10a..6dea557fa32fd44674bf01e2f7429c9691c315b8 100644
+index 0a7e4449407104fe6c0ff7d00bd1f32eb074e10a..32daf027a3575d73aeabf9db14a2e0c74e4cc7e6 100644
 --- a/src/main/java/net/minecraft/server/Entity.java
 +++ b/src/main/java/net/minecraft/server/Entity.java
 @@ -1968,11 +1968,12 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
@@ -47,6 +47,15 @@ index 0a7e4449407104fe6c0ff7d00bd1f32eb074e10a..6dea557fa32fd44674bf01e2f7429c96
          if (!this.world.isClientSide && !this.dead) {
              this.world.getMethodProfiler().enter("changeDimension");
              MinecraftServer minecraftserver = this.getMinecraftServer();
+@@ -2743,7 +2750,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
+                 entity.bukkitEntity = this.getBukkitEntity();
+ 
+                 if (this instanceof EntityInsentient) {
+-                    ((EntityInsentient)this).unleash(true, false); // Unleash to prevent duping of leads.
++                    ((EntityInsentient)this).unleash(true, true); // Paper drop lead
+                 }
+                 // CraftBukkit end
+             }
 @@ -2760,7 +2767,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
      }