[libvirt] [RFC] relax offline migration requirements to --xml

Hi, all. I'm thinking of leveraging of existing migration API to support offline clone in virtuozzo. AFAIK offline migration is basically just copying of domain config to the other side and defining it there. It is even possible to slightly mutate it thru options like --dname or --xml but mutation restrictions are the same as in case of active domain migration which is quite tight for an offline clone case. In case of clone we want to change uuid, MACs etc. Well the changes itself could be done by mgmt but this requires that libvirt drops the restictive checks for --xml option. What is your evaluation of this approach? Nikolay