[libvirt] [PATCH 00/11] Integration of lock managers in QEMU driver (v2)

This is a second iteration of the patches from https://www.redhat.com/archives/libvir-list/2010-November/msg00975.html Since the last posting quite alot of dev & testing has been done. The main changes are: - There is now a <lease> element in the XML to allow locking against resources not otherwise in the XML - The 'sanlock' plugin implementation is now in-tree - The 'lock_driver.h' header is now longer publically installed. All lock manager impls must be in-tree. This prevents closed source plugins, and more importantly allows full integration of error reporting - Improved virCommand handshake to allow error message to be passed back to libvirtd This version is now actually tested with sanlock and works for initial VM startup at least, successfully preventing QEMU being started more than once for a given config. Still todo: - Merge this series with the huge RPC series - Wire up a fcntl based plugin - Integration with migration workflow