[0221] Revert "[0220] Fixed creatures civilian field"
Probably due to the changes made to civilians between classic and TBC, many creatures have their flags_extra set to civilian when they should probably be set to passive. This made the revision 0220 give civilian status to a lot of NPC/creatures that should not have it, possibly breaking the HK/DK system. Thus, reverting rev 0220 while waiting to proper fix of flags_extra.

This reverts commit 7d2bf49575283386addafb71ccfd42f320c79ef7.