Mark potions of mutation as evil for Zin worshippers, and poisoned

weapons and ammunition as evil for TSO worshippers. Also, mark all demonic weapons as evil, whether their types are known or not.

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@6227 c06c8d41-db1a-0410-9941-cceddc491573

Created by  dolorous  on June 29, 2008
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