Re-Add per player mob spawning

Spigot-Server-Patches/Optimize-isOutsideRange-to-use-distance-maps.patch

@@ -290,6 +290,11 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        // Paper end - optimise PlayerChunkMap#isOutsideRange
      }
  
+     public void updatePlayerMobTypeMap(Entity entity) {
+@@ -0,0 +0,0 @@ public class PlayerChunkMap extends IChunkLoader implements PlayerChunk.d {
+         return entityPlayer.mobCounts[enumCreatureType.ordinal()];
+     }
+ 
 +    private static double getDistanceSquaredFromChunk(ChunkCoordIntPair chunkPos, Entity entity) { return a(chunkPos, entity); } // Paper - OBFHELPER
      private static double a(ChunkCoordIntPair chunkcoordintpair, Entity entity) {
          double d0 = (double) (chunkcoordintpair.x * 16 + 8);