Seven year old suggestion was to have a killer bee eat royal jelly if
there was no queen around, then after a short delay it would become a
queen. This does that, with "no queen around" being "no queen bee on
current dungeon level" and the transformation happening immediately
with the "short delay" taking place after.
Pet killer bees will target nearby royal jelly if there's no queen,
hostile killer bees will only eat it if they happen to walk on the
same spot as one. Both types accept either tame or hostile queen bee
as an existing queen.
Killer bees eating royal jelly will drop dead if queen bees have been
genocided, and aren't smart enough to avoid the instinct to eat such
if/when that happens to be the situation.
this display-support for a 3.6.1 feature was originally committed
to master but it might as well accompany the 3.6 line changes
that are already there.
