Go back to having all info in one rzdb file.

We can still split the rzdb file into a main file and a file data and a details file, but that's only for optimizing the required download size. On the system we always combine the parts back into one rzdb file once downloaded.

committer: J. Ali Harlow <ali@juiblex.co.uk>

 Kristian Høgsberg <krh@redhat.com>