add back optimizing ServerLevel chunk checking methods

patches/server/0664-Added-PlayerDeepSleepEvent.patch

@@ -0,0 +1,22 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Jake Potrebic <jake.m.potrebic@gmail.com>
+Date: Wed, 21 Apr 2021 15:58:19 -0700
+Subject: [PATCH] Added PlayerDeepSleepEvent
+
+
+diff --git a/src/main/java/net/minecraft/world/entity/player/Player.java b/src/main/java/net/minecraft/world/entity/player/Player.java
+index 183b621cbf6fbe7cec144af69fd74461b2471142..d286d88a3c3f93dbfa92de9421e320c92cd96350 100644
+--- a/src/main/java/net/minecraft/world/entity/player/Player.java
++++ b/src/main/java/net/minecraft/world/entity/player/Player.java
+@@ -247,6 +247,11 @@ public abstract class Player extends LivingEntity {
+ 
+         if (this.isSleeping()) {
+             ++this.sleepCounter;
++            // Paper start
++            if (this.sleepCounter == 100) {
++                if (!new io.papermc.paper.event.player.PlayerDeepSleepEvent((org.bukkit.entity.Player) getBukkitEntity()).callEvent()) { this.sleepCounter = Integer.MIN_VALUE; }
++            }
++            // Paper end
+             if (this.sleepCounter > 100) {
+                 this.sleepCounter = 100;
+             }