dipping into burning potions

- candles, et al, light via catch_lit
- non-weapons can be damaged
- only flammable items can be damaged, previously SILVER objects, for example,
  would get a message, but add_erosion_words wouldn't display a damage word
- can't track burnt food, put this in the "seems" case too
- PLASTIC items are is_flammable, which is appropriate for all current uses
- paper gets destroyed (special artifacts excepted by earlier check)
- a cursed potion now spills even if not dipping weapons
- charge for damaging unpaid objects this way
- still very hard to destroy PYEC this way

doc/fixes34.0

@@ -455,6 +455,8 @@ don't slap against the floor while riding and eating bad food
 got rid of "nori" (since it doesn't really translate "kelp frond" accurately)
 engraving in fog-covered location on in the Wizard quest said you
 	engraved in air, not dust
+dipping non-weapons into burning potions of oil had no effect
+dipping arrows into burning potions resulted in rust damage
 
 
 Platform- and/or Interface-Specific Fixes
@@ -576,6 +578,7 @@ USER_SOUNDS compilation option to enable use of SOUND and SOUNDDIR variables
 resistance does not protect inventory from artifacts (cold vs Frost Brand,&c)
 phrase the prompts for P and R commands using "put on" and "remove" as the
 	actions rather than repeating W and T commands' "wear" and "take off"
+dipping candles, et al, into burning potions lights them
 
 
 Platform- and/or Interface-Specific New Features