Gehennom tweaks

Zuggutmoy level is lit

Dagon level has upstairs in a different place (stairs were being overwriten during mazewalk
Incantifiers can eat Aoas and Aoa droplets
Potion of Blood improvements

Incantifiers and Clockworks don't get nutrition from drinking one.

Thrown potions deal damage (fire, cold, acid, or poison) based on the monster the blood was drawn from

Vampires, Incantifiers, and Clockworks use tinning kits to make a potion of blood from any corpse containing blood, regardless of age.
Anti-Farming Patch

Removes death drops from common dividing monsters.

I was finding that confrontations with razorvine tended to leave a lot of death drops, so I removed death drops from most common replicating monsters.
Bugfix: Vampires should still get hungry
Vampires can ID potions of blood by sight