append to main.log instead of truncating each time it is opened (it will still be removed when cleaning)
append to main.log instead of truncating each time it is opened (it will still be removed when cleaning)

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@146737 d073be05-634f-4543-b044-5fe20cf6d1d6

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