Fix CraftNamespacedKey shenanigans (#6825)

patches/server/0837-Fix-Bukkit-NamespacedKey-shenanigans.patch

@@ -0,0 +1,19 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Nassim Jahnke <jahnke.nassim@gmail.com>
+Date: Sun, 24 Oct 2021 15:49:35 +0200
+Subject: [PATCH] Fix Bukkit NamespacedKey shenanigans
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftNamespacedKey.java b/src/main/java/org/bukkit/craftbukkit/util/CraftNamespacedKey.java
+index 5f40d240b879e3989897b6e45725a8e5a6a7f194..5014192edb9616ce725fc1592832034789527b6f 100644
+--- a/src/main/java/org/bukkit/craftbukkit/util/CraftNamespacedKey.java
++++ b/src/main/java/org/bukkit/craftbukkit/util/CraftNamespacedKey.java
+@@ -13,7 +13,7 @@ public final class CraftNamespacedKey {
+             return null;
+         }
+         ResourceLocation minecraft = ResourceLocation.tryParse(string);
+-        return (minecraft == null) ? null : CraftNamespacedKey.fromMinecraft(minecraft);
++        return (minecraft == null || minecraft.getPath().isEmpty()) ? null : CraftNamespacedKey.fromMinecraft(minecraft); // Paper - Bukkit's parser does not match Vanilla for empty paths
+     }
+ 
+     public static NamespacedKey fromString(String string) {