New upstream version 1.13.19.
    
    - New tool: virt-sysprep.
    - Remove the old guestfish and libguestfs-mount packages, and put these
      tools into libguestfs-tools.  This change is long overdue, but is also
      necessitated by the new virt-sysprep tool.  This new tool would pull
      in guestfish anyway, so having separate packages makes no sense.
    - Remove old obsoletes for virt-cat, virt-df, virt-df2 and virt-inspector,
      since those packages existed only in much older Fedora.