Add support for an optional distfiles cache image to avoid refetching distfiles for each separate packaging run (this can get really large though, so it's purely optional if you'd rather trade bandwidth for disk space).
Add support for an optional distfiles cache image to avoid refetching
distfiles for each separate packaging run (this can get really large
though, so it's purely optional if you'd rather trade bandwidth for disk
space).

git-svn-id: 620571fa9b4bd0cbce9a0cf901e91ef896adbf27@9702 d073be05-634f-4543-b044-5fe20cf6d1d6

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