Revert patch 58f036ad that causes object duplication (which tried to fix objects getting hidden from client) and fix the original problem correctly. This fixes the second distinct object duplication bug.

Fix Result of processed Request was written to invalid (non existent) ResultQueue if requesting thread timed out before

Fix screwed-up indentation

This reverts commit 3985c01a.

Decoration: Stop DecoSimple::resolveNodeNames from complaining about no node name if decolist is used

Fix warning message for spawnby nodes

Prevent type-punning warning caused by casting enum to int

The real problem was that MapBlocks were not activated before getting sent to the client

A mapgen fix authored by paramat, as mentioned here: https://github.com/minetest/minetest/issues/989