add back optimizing ServerLevel chunk checking methods

patches/server/0506-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 8bedc2cad5faf621ac5515fafcd093e3bd180126..eb12da04a495166e101b234ec3640363ec2403a5 100644
+--- a/src/main/java/net/minecraft/server/players/PlayerList.java
++++ b/src/main/java/net/minecraft/server/players/PlayerList.java
+@@ -142,7 +142,7 @@ 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 407a91f64e040745dea17544d6b7c6d125866c62..c4d7ac8abd7d86e8a4e2d8a3340d04f8710e925c 100644
+--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
++++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+@@ -616,6 +616,13 @@ 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