[libvirt] question about MigrateSetMaxDowntime

[Jim Fehlig]

A user asked me about setting max downtime prior to migration, which I thought 
could be done similar to MigrateSetMaxSpeed.  I was surprised to find that it 
can only be set when migration is in progress

# virsh migrate-setmaxdowntime test 1000
error: Requested operation is not valid: domain is not being migrated

Is there any reason this cannot be set prior to migration?  Max speed can even 
be set on a persistent domain that is not running. I'd be happy to work on a 
patch if the only reason is no one has needed this itch scratched.

Regards,
Jim