Use mark_for_update instead of using operators on our own.
Merge remote-tracking branch 'upstream/Bleeding-Edge' into 3gbe@vf1
Just check four dir.
Remove redundant update.
Support for multi-tile.
Revert it and make sure it's only loop 4 times.
Allow space and inherit it.
Cleanup.
I forgot.
Unused at new /bay/ ZAS.
Unsure, revert.
Applied Arancalos fix for firedoors, no more process for them, from /bay/.
Merge remote-tracking branch 'upstream/Bleeding-Edge' into 3gbe@vf1
Merge remote-tracking branch 'upstream/Bleeding-Edge' into 3gbe@vf1
Merge pull request #698 from ESwordTheCat/3gbe@vf1

Reduce features