Bring back autoexplore

... but don't parse floor item messages during autoexplore,
since they might have the wrong player location value.
Use Trog's Hand when poisoned and at low HP

(For playing races other than Gr, of course.)
Add stats for dragon armours
Examine current square with ; when it needs update
Swing wildly when there are invisible monsters around

Will break hilariously if we somehow miss the "Reactivating autopickup"
message...
Pears are off-limits
Use Trog's Hand for MR
Berserk ghosts
Escape shop traps