USN-1008-4: libvirt regression

USN-1008-1 fixed vulnerabilities in libvirt. The upstream fixes for CVE-2010-2238 changed the behavior of libvirt such that the domain XML could not specify 'hostdevice' as the qemu sub-type. While libvirt 0.8.3 and later will longer support specifying this sub-type, this update restores the old...