add experimental code for testing for mtree violations (only some currently); the test can be overriden by "destroot.violate_mtree yes"
add experimental code for testing for mtree violations (only some currently);
the test can be overriden by "destroot.violate_mtree yes"

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@27199 d073be05-634f-4543-b044-5fe20cf6d1d6

macports/macports-base,neverpanic/macports-base,danchr/macports-base,neverpanic/macports-base,danchr/macports-base,macports/macports-base