Update from upstream SpigotMC

Add unbreakable API to item meta SpigotMC/Spigot@b1af008222
Configure how often EntityHangings calculate if they should die. SpigotMC/Spigot@ac6e1fc32d
Copy ItemStacks in DataWatcher to prevent ConcurrentModificationExcep… SpigotMC/Spigot@2af28ffbd1
Add the spigot.yml into the timings paste SpigotMC/Spigot@d61f38bd58

Note: This commit moves the entity-hanging tick into Spigot's spigot.yml and out of our paper.yml

Bukkit-Patches/0002-Spigot-Timings.patch

@@ -19,6 +19,36 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      }
  
      /**
+@@ -0,0 +0,0 @@ public final class Bukkit {
+     public static UnsafeValues getUnsafe() {
+         return server.getUnsafe();
+     }
++
++    public static Server.Spigot spigot()
++    {
++        return server.spigot();
++    }
+ }
+diff --git a/src/main/java/org/bukkit/Server.java b/src/main/java/org/bukkit/Server.java
+index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
+--- a/src/main/java/org/bukkit/Server.java
++++ b/src/main/java/org/bukkit/Server.java
+@@ -0,0 +0,0 @@ public interface Server extends PluginMessageRecipient {
+      */
+     @Deprecated
+     UnsafeValues getUnsafe();
++
++    public class Spigot
++    {
++
++        public org.bukkit.configuration.file.YamlConfiguration getConfig()
++        {
++            throw new UnsupportedOperationException( "Not supported yet." );
++        }
++    }
++
++    Spigot spigot();
+ }
 diff --git a/src/main/java/org/bukkit/command/Command.java b/src/main/java/org/bukkit/command/Command.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/command/Command.java
@@ -142,6 +172,10 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +                CustomTimingsHandler.printTimings(fileTimings);
 +                fileTimings.println( "Sample time " + sampleTime + " (" + sampleTime / 1E9 + "s)" );
 +
++                fileTimings.println( "<spigotConfig>" );
++                fileTimings.println( Bukkit.spigot().getConfig().saveToString() );
++                fileTimings.println( "</spigotConfig>" );
++
 +                if ( paste )
 +                {
 +                    new PasteThread( sender, bout ).start();