Updated Upstream (Bukkit/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

Bukkit Changes:
5b680f0b Note maximum objective score length in documentation

CraftBukkit Changes:
5932f8a7 Load default world spawn areas in consistent order
3a5dc78f Fix confusing migration message appearing on fresh server
516a408f Remove redundant CraftBukkit change for secondary world data
73a2c749 Process conversation input on the main thread.
100c3f07 Cap Objective Score Length
6e842759 Cross World Entity Teleportation
7deba1c6 Check for blank OfflinePlayer Names
f2746a5e Descriptive kick reasons instead of Nope!
b0212308 Cap Channel Registrations
a610dcd8 Identify CraftScheduler threads with useful names

Spigot Changes:
19c3c5a5 Rebuild patches

Spigot-Server-Patches/Optimize-Hoppers.patch

@@ -31,7 +31,7 @@ index 10efe6b3d..6feea98b6 100644
      private void disableSprintInterruptionOnAttack() {
          disableSprintInterruptionOnAttack = getBoolean("game-mechanics.disable-sprint-interruption-on-attack", false);
 diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
-index e0091358a..99dab7a47 100644
+index 76f80e7eb..3451ea3da 100644
 --- a/src/main/java/net/minecraft/server/ItemStack.java
 +++ b/src/main/java/net/minecraft/server/ItemStack.java
 @@ -0,0 +0,0 @@ public final class ItemStack {
@@ -47,7 +47,7 @@ index e0091358a..99dab7a47 100644
          itemstack.d(this.B());
          if (this.tag != null) {
 diff --git a/src/main/java/net/minecraft/server/MinecraftServer.java b/src/main/java/net/minecraft/server/MinecraftServer.java
-index 5a0dbcb42..59a71e5b0 100644
+index e993b4da6..41c9dccab 100644
 --- a/src/main/java/net/minecraft/server/MinecraftServer.java
 +++ b/src/main/java/net/minecraft/server/MinecraftServer.java
 @@ -0,0 +0,0 @@ public abstract class MinecraftServer implements IAsyncTaskHandler, IMojangStati