Hydras now behave the same way in monster-vs-monster combat as they do in

player vs monster. Specifically, hydras get their as many attacks as they have heads vs other monsters, and other monsters can chop off hydra heads (at 25% of the probability that the player has of chopping off heads).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@936 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dshaligram  on February 8, 2007
33ZMPQC6OXTESW7SRW765GRNJUEJRSYONRVZVIEUDAUEJ2PPMB4AC
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