Add destroot.keepdirs feature as a (much better) alternative to .turd files.
Add destroot.keepdirs feature as a (much better) alternative to .turd files.

Bug:		https://trac.macports.org/ticket/2366
Submitted by:   James Berry <james@jberry.us>

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@9176 d073be05-634f-4543-b044-5fe20cf6d1d6

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