[libvirt] [PATCH 0/1] Support domain restore from root-squash NFS

Most of the explanation is in the commit message with the patch proper. When reveiwing please take pains to point out any places where I may not be diligent enough cleaning up loose ends, especially in terms of assuring that the child process always terminates properly no matter what happens. The (unrelated) race condition in qemudDomainRestore() remains - I solved it locally by putting a sleep(10) just before qemuMonitorStartCPUs(), but it needs something with a bit higher comfort factor ;-)