[Libguestfs] supermin in Fedora Rawhide switched (again) to using dnf instead of yum

[Richard W.M. Jones]

Previous attempt:
https://www.redhat.com/archives/libguestfs/2015-April/msg00013.html

supermin needs to download packages (eg. RPMs) when preparing the
appliance.

After a lot of work, 'dnf download' can now be used as a replacement
for the (deprecated) 'yumdownloader' program.

This only affects the 'supermin --prepare' phase, which means it only
affects people building libguestfs from source.  Ordinary use of
libguestfs, even in Rawhide, should be unaffected.

If you are building libguestfs from source on Fedora please try the
new supermin + dnf, and let me know if you find any problems.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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