Updated Upstream (Bukkit/CraftBukkit)

Upstream has released updates that appear 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:
1e843b72 #510: Add NamespacedKey#fromString() to fetch from user input
a4d18241 #581: Add methods to modify despawn delay for wandering villagers

CraftBukkit Changes:
0cd8f19f #802: Add methods to modify despawn delay for wandering villagers
d5c5d998 SPIGOT-6362: ConcurrentModificationException: null --> Server Crash
8c7d69fe SPIGOT-5228: Entities that are removed during chunk unloads are not properly removed from the chunk.

Spigot-API-Patches/Add-an-API-for-CanPlaceOn-and-CanDestroy-NBT-values.patch

@@ -202,7 +202,7 @@ diff --git a/src/main/java/org/bukkit/NamespacedKey.java b/src/main/java/org/buk
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/NamespacedKey.java
 +++ b/src/main/java/org/bukkit/NamespacedKey.java
-@@ -0,0 +0,0 @@ import org.jetbrains.annotations.NotNull;
+@@ -0,0 +0,0 @@ import org.jetbrains.annotations.Nullable;
   * underscores, hyphens, and forward slashes.
   *
   */

Spigot-Server-Patches/Fix-unregistering-entities-from-unloading-chunks.patch

@@ -22,7 +22,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      }
  
      private void removeEntityFromChunk(Entity entity) {
--        IChunkAccess ichunkaccess = this.getChunkAt(entity.chunkX, entity.chunkZ, ChunkStatus.FULL, false);
+-        IChunkAccess ichunkaccess = chunkProvider.getChunkUnchecked(entity.chunkX, entity.chunkZ); // CraftBukkit - SPIGOT-5228: getChunkAt won't find the entity's chunk if it has already been unloaded (i.e. if it switched to state INACCESSIBLE).
 +        Chunk ichunkaccess = entity.getCurrentChunk(); // Paper - getChunkAt(x,z,full,false) is broken by CraftBukkit as it won't return an unloading chunk. Use our current chunk reference as this points to what chunk they need to be removed from anyways
  
 -        if (ichunkaccess instanceof Chunk) {

Spigot-Server-Patches/MC-Utils.patch

@@ -3993,24 +3993,25 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +
 +    public final boolean isEntityTickingReady() {
 +        return this.isEntityTickingReady;
-     }
- 
++    }
++
 +    public final boolean isTickingReady() {
 +        return this.isTickingReady;
 +    }
 +
 +    public final boolean isFullChunkReady() {
 +        return this.isFullChunkReady;
-+    }
+     }
 +    // Paper end
-+
+ 
      // CraftBukkit start
 -    public Chunk getFullChunk() {
 +    public final Chunk getFullChunk() { // Paper - final for inline
          if (!getChunkState(this.oldTicketLevel).isAtLeast(PlayerChunk.State.BORDER)) return null; // note: using oldTicketLevel for isLoaded checks
-         CompletableFuture<Either<IChunkAccess, PlayerChunk.Failure>> statusFuture = this.getStatusFutureUnchecked(ChunkStatus.FULL);
-         Either<IChunkAccess, PlayerChunk.Failure> either = (Either<IChunkAccess, PlayerChunk.Failure>) statusFuture.getNow(null);
-         return either == null ? null : (Chunk) either.left().orElse(null);
+         return this.getFullChunkUnchecked();
+     }
+@@ -0,0 +0,0 @@ public class PlayerChunk {
+         return (either == null) ? null : (Chunk) either.left().orElse(null);
      }
      // CraftBukkit end
 +    // Paper start - "real" get full chunk immediately