Delete unused methods and make types and fields private where
possible. Some code is moved around, but apart from that there
is no change in behavior.
The naming of the distros were moved back into the distro
packages as the common types now only had one user, and this
allowed us to drop some redundant error checking.
Signed-off-by: Tom Gundersen <teg@jklm.no>
87b0bb6e5d