fix up a few places where the bool value was the default, instead of

the opposite of the default. Also, fix what looked like a mistake (autopickup_no_burden was a bool, but not commented out like the rest of the bools; so it was overriding the default, by default)

git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@4097 c06c8d41-db1a-0410-9941-cceddc491573

Created by  pauldubois  on April 7, 2008
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