1 Download orig.tar.gz even if archive has hash
3 Cope with outside-main things (rmadison does not print pool path)
5 Cope with non-Debian archives
7 Make it possible to do dgit clone / fetch anonymously
9 Archive agility. Archive needs to specify (a) way to get versions
10 and paths in archive for dscs (b) unpriv pull location (c) priv
13 Support Format 3.0 (quilt)