Option to automatically clean distfile too

[ranauei@…]

I think will be a good idea to let the user decide if retain a copy of a source packet (usually tar.gz) in the distfiles directory or delete it after a port installation. This will be an enhancement to the autoclean feature that is already available and will makenecessary to do a manual cleanup with port clean --dist . That's because I personally consider just a waste of space keeping all that stuff one the port is installed (or especially for uninstalled ports), however for someone is useful when an internet connection isn't available so...let the user decide :)

[jlaurila@…]

Cc Me!