Prevents fleeing or feared units from going to upper floor ignoring walls/ceilings with mmaps on(and usually get stucked).
Current implementation just randomly selects a distance and angle against the frighting unit, when in narrow circumstance such as underground caves, such targeting point would be at another floor.
Closes#11300
Ref #9475 (needs fixed confirmation)
* Moved everything into one specialized method instead of being scattered all over the place
* Allow localizing creature names in chat messages (when using $N)
* Send SMSG_GM_MESSAGECHAT for gm messages
zengwf