[Libguestfs] Preparatory work on virt-v2v -o openstack mode

[Richard W.M. Jones]

I have written some more detailed documentation for how output modules
(such as the proposed ‘-o openstack’) work in virt-v2v:

  https://github.com/libguestfs/libguestfs/blob/f9898e12abaea9f99b2a6da1858ae71fdd8e952b/v2v/types.mli#L384
  cf: https://github.com/rwmjones/libguestfs/blob/openstack/v2v/output_openstack.ml#L81

Please let me know if any of this is unclear.

Rich.

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