Track monster types
Eagerly kill monsters
Track level fringe
Do pathfinding backwards
Pathfind around plants, traps, etc.
Play MiBe
Rest
Use o, 5 commands
Get rid of trapwalk_safe_hp

We shouldn't need this any more, since we fallback from autoexplore
to manual exploration and we answer yes to "Really enter?" prompts.
The default is probably best for getting sensible autoexplore.
Don't try to pick up loot in a tele trap
Sacrifice corpses