Simplify the upgrade proc's behaviour when it encounters a port that is not installed due to a soft dependency. Fixes https://trac.macports.org/ticket/17992.
Simplify the upgrade proc's behaviour when it encounters a port that is not installed due to a soft dependency. Fixes https://trac.macports.org/ticket/17992.

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@45365 d073be05-634f-4543-b044-5fe20cf6d1d6

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