Updated Upstream (CraftBukkit/Spigot)

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

CraftBukkit Changes:
eb2e6578 SPIGOT-5116: Fix concurrent modification exception inside ChunkMapDistance
989f9b3d SPIGOT-4849: Fix server crash when accessing chunks during chunk load/unload/populate events
f554183c SPIGOT-5171: Don't fire PlayerTeleportEvent if not actually moving
2349feb8 SPIGOT-5163: Cancelling PlayerBucketFillEvent visually removes the targeted block

Spigot Changes:
9a643a6a Remove DataWatcher Locking

Spigot-Server-Patches/Fix-sign-edit-memory-leak.patch

@@ -6,7 +6,7 @@ Subject: [PATCH] Fix sign edit memory leak
 when a player edits a sign, a reference to their Entity is never cleand up.
 
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
-index cad75ff9b6..e502e53659 100644
+index fad7f0df3..67b3e2c97 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java
 +++ b/src/main/java/net/minecraft/server/PlayerConnection.java
 @@ -0,0 +0,0 @@ public class PlayerConnection implements PacketListenerPlayIn {
@@ -19,7 +19,7 @@ index cad75ff9b6..e502e53659 100644
                  this.sendPacket(tileentity.getUpdatePacket()); // CraftBukkit
                  return;
 diff --git a/src/main/java/net/minecraft/server/TileEntitySign.java b/src/main/java/net/minecraft/server/TileEntitySign.java
-index 15b3add9ed..caeaca4c7a 100644
+index 275b82b10..281a2a88b 100644
 --- a/src/main/java/net/minecraft/server/TileEntitySign.java
 +++ b/src/main/java/net/minecraft/server/TileEntitySign.java
 @@ -0,0 +0,0 @@ public class TileEntitySign extends TileEntity implements ICommandListener { //