Revert "Remove "Implement-Chunk-Priority-Urgency-System-for-Chunks" (Fixes #5980)"

This reverts commit aa52bf9e33.

patches/server/0595-Empty-commands-shall-not-be-dispatched.patch

@@ -1,18 +0,0 @@
-From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
-From: Mariell Hoversholm <proximyst@proximyst.com>
-Date: Wed, 6 Jan 2021 23:38:43 +0100
-Subject: [PATCH] Empty commands shall not be dispatched
-
-
-diff --git a/src/main/java/net/minecraft/commands/Commands.java b/src/main/java/net/minecraft/commands/Commands.java
-index f9b37c873b6b02f14bb7a7225197c552a7f7c5b9..5574c19d32bb8a0c08011be9ebb9105886459ec0 100644
---- a/src/main/java/net/minecraft/commands/Commands.java
-+++ b/src/main/java/net/minecraft/commands/Commands.java
-@@ -230,6 +230,7 @@ public class Commands {
-         command = event.getCommand();
- 
-         String[] args = command.split(" ");
-+        if (args.length == 0) return 0; // Paper - empty commands shall not be dispatched
- 
-         String cmd = args[0];
-         if (cmd.startsWith("minecraft:")) cmd = cmd.substring("minecraft:".length());