A bit of cleanup plus some gratuitous variable renaming. I think using
structures instead of numeric offsets makes this code much more
understandable.

Also added a comment about current time range expected by
the server.
Acked-by: NJeff Layton <jlayton@redhat.com>
Reviewed-by: NShirish Pargaonkar <spargaonkar@suse.com>
Signed-off-by: NTim Gardner <tim.gardner@canonical.com>
Signed-off-by: NSteve French <smfrench@gmail.com>