[libvirt] Allow to migrate to same host?

[Osier Yang]

The request is from a PhD stdudent in France, he is developing some
distributed system based on libvirt, before deploying the codes to real
instances, he want to test it on his own box first.

Libvirt checks if it's migrating to same host by comparing the hostname,
I'm wondering if we can add some flag to switch the checking on/off,
(probally a new property in qemu.conf?), so that one can test the migration
on same host just for development purpose.

Thoughts?

Regards
Osier