Clean up rotting in melee attacks to not kill the target directly and to

use special_damage_msg, as with draining.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@8636 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on January 20, 2009
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