Do not load chunks for light checks

Should only happen for blocks on the edge that uses neighbors light level
(certain blocks). In that case, there will be 3-4 other neighbors to get a light level from.

Spigot-Server-Patches/0004-MC-Utils.patch

@@ -1,4 +1,4 @@
-From d7343318730a1a96448116c422161127a8bc0600 Mon Sep 17 00:00:00 2001
+From bb8dd93f486683d2a80fe0d23337f11faca44e9a Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Mon, 28 Mar 2016 20:55:47 -0400
 Subject: [PATCH] MC Utils
@@ -7,10 +7,10 @@ Collection of utils to help reduce NMS diff
 
 diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
 new file mode 100644
-index 0000000..f76fd44
+index 0000000..3004822
 --- /dev/null
 +++ b/src/main/java/net/minecraft/server/MCUtil.java
-@@ -0,0 +1,109 @@
+@@ -0,0 +1,115 @@
 +package net.minecraft.server;
 +
 +import org.bukkit.Location;
@@ -119,7 +119,13 @@ index 0000000..f76fd44
 +    public static Location toLocation(Entity entity) {
 +        return new Location(entity.getWorld().getWorld(), entity.locX, entity.locY, entity.locZ);
 +    }
++
++    public static boolean isEdgeOfChunk(BlockPosition pos) {
++        final int absX = Math.abs(pos.getX()) % 16;
++        final int absZ = Math.abs(pos.getZ()) % 16;
++        return (absX == 0 || absX == 15 || absZ == 0 || absZ == 15);
++    }
 +}
 -- 
-2.7.4
+2.8.0
 

Spigot-Server-Patches/0125-Do-not-load-chunks-for-light-checks.patch

@@ -0,0 +1,23 @@
+From ea50a2f4bccc3f86ce363e53f345acc3b434b8bb Mon Sep 17 00:00:00 2001
+From: Aikar <aikar@aikar.co>
+Date: Thu, 31 Mar 2016 19:17:58 -0400
+Subject: [PATCH] Do not load chunks for light checks
+
+Should only happen for blocks on the edge that uses neighbors light level
+(certain blocks). In that case, there will be 3-4 other neighbors to get a light level from.
+
+diff --git a/src/main/java/net/minecraft/server/World.java b/src/main/java/net/minecraft/server/World.java
+index fa84bad..89103d6 100644
+--- a/src/main/java/net/minecraft/server/World.java
++++ b/src/main/java/net/minecraft/server/World.java
+@@ -723,6 +723,7 @@ public abstract class World implements IBlockAccess {
+                 if (blockposition.getY() >= 256) {
+                     blockposition = new BlockPosition(blockposition.getX(), 255, blockposition.getZ());
+                 }
++                if (!this.isLoaded(blockposition)) return 0; // Paper
+ 
+                 Chunk chunk = this.getChunkAtWorldCoords(blockposition);
+ 
+-- 
+2.8.0
+