Remove warning for custom entities in precreaturespawn, add note to event

We can't fix this. The event will simply not fire for hacky plugins replacing
entity registrations.

Spigot-API-Patches/0081-PreCreatureSpawnEvent.patch

@@ -1,4 +1,4 @@
-From a7b0ffbf5d18452aef72e50c0c588d945024aada Mon Sep 17 00:00:00 2001
+From 7d386845b7417cb8d36aea49b63de9db5f9209c4 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sun, 14 Jan 2018 16:59:43 -0500
 Subject: [PATCH] PreCreatureSpawnEvent
@@ -16,10 +16,10 @@ See: https://github.com/PaperMC/Paper/issues/917
 
 diff --git a/src/main/java/com/destroystokyo/paper/event/entity/PreCreatureSpawnEvent.java b/src/main/java/com/destroystokyo/paper/event/entity/PreCreatureSpawnEvent.java
 new file mode 100644
-index 00000000..c4751b61
+index 00000000..bac1cef3
 --- /dev/null
 +++ b/src/main/java/com/destroystokyo/paper/event/entity/PreCreatureSpawnEvent.java
-@@ -0,0 +1,97 @@
+@@ -0,0 +1,98 @@
 +package com.destroystokyo.paper.event.entity;
 +
 +import com.google.common.base.Preconditions;
@@ -37,6 +37,7 @@ index 00000000..c4751b61
 + * The intent of this event is to improve server performance, so limited use cases.
 + * 
 + * Currently: NATURAL and SPAWNER based reasons. Please submit a Pull Request for future additions.
++ * Also, Plugins that replace Entity Registrations with their own custom entities might not fire this event.
 + */
 +public class PreCreatureSpawnEvent extends Event implements Cancellable {
 +    private final Location location;

Spigot-Server-Patches/0263-PreCreatureSpawnEvent.patch

@@ -1,4 +1,4 @@
-From c64d71ef13bc28059dd6e326df41adda0e77d11d Mon Sep 17 00:00:00 2001
+From 3e08a65a29f3522738000548059c21f2fc6719cb Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sun, 14 Jan 2018 17:01:31 -0500
 Subject: [PATCH] PreCreatureSpawnEvent
@@ -15,7 +15,7 @@ instead and save a lot of server resources.
 See: https://github.com/PaperMC/Paper/issues/917
 
 diff --git a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
-index c29df55fa..3c591e67e 100644
+index 87fe4775f..9d580ea01 100644
 --- a/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
 +++ b/src/main/java/net/minecraft/server/MobSpawnerAbstract.java
 @@ -1,6 +1,7 @@
@@ -57,10 +57,10 @@ index c29df55fa..3c591e67e 100644
  
                      if (entity == null) {
 diff --git a/src/main/java/net/minecraft/server/SpawnerCreature.java b/src/main/java/net/minecraft/server/SpawnerCreature.java
-index 2cd063829..f64de94fa 100644
+index 2cd063829..e217d3340 100644
 --- a/src/main/java/net/minecraft/server/SpawnerCreature.java
 +++ b/src/main/java/net/minecraft/server/SpawnerCreature.java
-@@ -184,6 +184,27 @@ public final class SpawnerCreature {
+@@ -184,6 +184,25 @@ public final class SpawnerCreature {
                                                      }
  
                                                      if (worldserver.a(enumcreaturetype, biomebase_biomemeta, (BlockPosition) blockposition_mutableblockposition) && a(EntityPositionTypes.a(biomebase_biomemeta.b), worldserver, blockposition_mutableblockposition)) {
@@ -81,8 +81,6 @@ index 2cd063829..f64de94fa 100644
 +                                                                ++j4;
 +                                                                continue;
 +                                                            }
-+                                                        } else {
-+                                                            MinecraftServer.LOGGER.warn("Warning, could not find EntityType for " + cls.getName() + " contains: " + (EntityTypes.clsToTypeMap.containsKey(cls) ? "yes" : "no") + " - Please report this to Paper at https://github.com/PaperMC/Paper/issues");
 +                                                        }
 +                                                        // Paper end
                                                          EntityInsentient entityinsentient;