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

This reverts commit aa52bf9e33.

patches/server/0507-Add-setMaxPlayers-API.patch

@@ -0,0 +1,37 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mariell Hoversholm <proximyst@proximyst.com>
+Date: Sat, 22 Aug 2020 23:59:30 +0200
+Subject: [PATCH] Add #setMaxPlayers API
+
+
+diff --git a/src/main/java/net/minecraft/server/players/PlayerList.java b/src/main/java/net/minecraft/server/players/PlayerList.java
+index 13f1b62e6f3adce54f82d6d131dd60976dc6f548..f2b139d565662fca1bbad46e50b5ccb0d08c4e37 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
++++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -145,7 +145,7 @@ public abstract class PlayerList {
+     public final PlayerDataStorage playerIo;
+     private boolean doWhiteList;
+     private final RegistryAccess.RegistryHolder registryHolder;
+-    protected final int maxPlayers;
++    protected int maxPlayers; public final void setMaxPlayers(int maxPlayers) { this.maxPlayers = maxPlayers; } // Paper - remove final and add setter
+     private int viewDistance;
+     private boolean allowCheatsForAllPlayers;
+     private static final boolean ALLOW_LOGOUTIVATOR = false;
+diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+index df20ac811d673c205695d563f84382d1bf1e82e1..c664c4fc1280fd57c3b7e8580294b3823b98eae9 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+@@ -621,6 +621,13 @@ public final class CraftServer implements Server {
+         return this.playerList.getMaxPlayers();
+     }
+ 
++    // Paper start
++    @Override
++    public void setMaxPlayers(int maxPlayers) {
++        this.playerList.setMaxPlayers(maxPlayers);
++    }
++    // Paper end
++
+     // NOTE: These are dependent on the corresponding call in MinecraftServer
+     // so if that changes this will need to as well
+     @Override