For TSO, change the "stabbing" conduct to an "unchivalrous attack"

conduct, and exercise it on every stabbing attempt, whether it succeeds or not (and also whether the player is berserk or not, since a berserk player trying to stab seems unchivalrous to me).

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5093 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on May 16, 2008
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