[libvirt] [PATCH 0/2] Fix xen domain listing

These patches are a re-post of Jonas Eriksson's work from a couple of months ago, that we mistakenly forgot to commit. The first patch is unchanged, apart from being adjusted for new source code layout. The second patch is changed so that it checks against the hypervisor, not Xend, since using Xend has a very serious performance impact (as much as 1 second per domain queried has been seen) Daniel