SPIGOT-113: Add save status to ChunkUnloadEvent

nms-patches/ChunkProviderServer.patch

@@ -140,17 +140,18 @@
                          ++i;
                      }
                  }
-@@ -197,6 +270,39 @@
+@@ -197,6 +270,40 @@
          return false;
      }
  
 +    // CraftBukkit start
 +    public boolean unloadChunk(Chunk chunk, boolean save) {
-+        ChunkUnloadEvent event = new ChunkUnloadEvent(chunk.bukkitChunk);
++        ChunkUnloadEvent event = new ChunkUnloadEvent(chunk.bukkitChunk, save);
 +        this.world.getServer().getPluginManager().callEvent(event);
 +        if (event.isCancelled()) {
 +            return false;
 +        }
++        save = event.isSaveChunk();
 +
 +        // Update neighbor counts
 +        for (int x = -2; x < 3; x++) {