Fix major security bugs (3 brushes + superpickaxe)! (#1213)

* Fix major security bugs (3 brushes + superpickaxe)!
- Due to some recent changes, FAWE could edit everything in the world, no matter other plugin protections such as PS or WG.
- Fix superpickaxe allow to bypass protections => Fix SurvivalModeExtent not taking into account protections plugins due to breaking blocks naturally to get drops.

* Adress requests
- Revert some unsuitabe changes
- Add FAWE diff comments

* Clean imports

* Adress requests

Co-authored-by: NotMyFault <mc.cache@web.de>

worldedit-core/src/main/java/com/sk89q/worldedit/world/World.java

@@ -50,6 +50,8 @@ import com.sk89q.worldedit.world.weather.WeatherType;
 
 import javax.annotation.Nullable;
 import java.nio.file.Path;
+import java.util.Collection;
+import java.util.Collections;
 import java.util.Locale;
 import java.util.Set;
 
@@ -218,6 +220,18 @@ public interface World extends Extent, Keyed, IChunkCache<IChunkGet> {
      */
     void simulateBlockMine(BlockVector3 position);
 
+    //FAWE start
+    /**
+     * Return items that may drop by destroying this block.
+     *
+     * @param position the position
+     * @return Block drops
+     */
+    default Collection<BaseItemStack> getBlockDrops(BlockVector3 position) {
+        return Collections.emptyList();
+    }
+    //FAWE end
+
     /**
      * Gets whether the given {@link BlockState} can be placed here.
      *