[libvirt] libvirt 0.7.7 and kvm 72

Hi, kvm 72 uses "info migration" instead of "info migrate": http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=574272 It's not only that, the output format of these commands differs too so that "virsh save" breaks. Stefan suggested the attached improved error message. Cheers, -- Guido