[Auto] Update Upstream

Upstream has released updates that appear to apply compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing.

Bukkit Changes:
d2834556 SPIGOT-4219: Event for PigZombies angering.

CraftBukkit Changes:
a9c796f1 SPIGOT-4184: Fix furnaces not matching Vanilla smelt or animations
195f071e SPIGOT-4219: Event for PigZombies angering.
5e3082c7 SPIGOT-4230: Improve legacy block types

Spigot-Server-Patches/Configurable-Alternative-LootPool-Luck-Formula.patch

@@ -36,7 +36,7 @@ This change will result in some major changes to fishing formulas.
 I would love to see this change in Vanilla, so Mojang please pull :)
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperConfig.java b/src/main/java/com/destroystokyo/paper/PaperConfig.java
-index 03846919f..5a17ce3d2 100644
+index 9bfbaf61e5..bcdf4f91d8 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperConfig.java
 @@ -0,0 +0,0 @@ public class PaperConfig {
@@ -53,7 +53,7 @@ index 03846919f..5a17ce3d2 100644
 +    }
  }
 diff --git a/src/main/java/net/minecraft/server/LotoSelectorEntry.java b/src/main/java/net/minecraft/server/LotoSelectorEntry.java
-index add618866..9f8e17b9d 100644
+index add618866b..9f8e17b9d3 100644
 --- a/src/main/java/net/minecraft/server/LotoSelectorEntry.java
 +++ b/src/main/java/net/minecraft/server/LotoSelectorEntry.java
 @@ -0,0 +0,0 @@ import java.util.Random;