Prevent auto-rotated nodes replacing the nodes they are placed on
Add protection support to auto-rotated nodes
Pass pointed_thing to after_place_node
Revert "Improve (re)spawn, add cache_block_before_spawn and max_spawn_height settings"

The commit didn't work because the blocks weren't loaded yet.

This reverts commit 22dbbf0a6fc9547f0dbdb7f6076337b8c6acd48b.

Conflicts:
	minetest.conf.example