hpmax restore activated at HPmax higher than 0
! of water used against iron golems are effective

2 to 6 or 1-\to 6 damage was pitiful, now it may be worth to use up a
water potion.

Also, it is now consistent with other rust effects.
refactor potion of water effects
refactor - remove pointless comment, better flow
! of water used against iron golems, as suicide
make quaffing water consistent with rust trap
encyclopedia entries  - from biodiversity patch

http://nethackwiki.com/wiki/Biodiversity_patch