Anti-grief tweaks, API updates.
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**13.9 Updates**
* When loot dropped by players on death is protected from theft, it's now also invulnerable to damage (like dumping lava on it). Note that if an item is covered by lava even a //little //bit, the client will stop rendering it. But if you clean up the lava, you'll find your items are still there. Items will still disappear if left for too long.
* Fixed players placing hopper minecarts without permission.
* API updates to support GriefPrevention Flags.