Re: [libvirt] PATCH: Support PolicyKit 1.0

In the seriously annoying way of things, the newest PolicyKit in Fedora 12 has been completely re-written from scratch with a totally incompatible application facing API. Conceptually it is still pretty similar though, with the exception that client applications no longer need to explicitly launch an auth dialog - that's done out-of-band by policykit itself. This patch adjusts libvirtd to the new API, and removes the libvirt client side code that spawned the auth helper. On the libvirtd side avoid their APIs and instead spawn an external auth checking program 'pkcheck', which returns 0 on success, non-0 for denial. In the final annoying bit, the XML format for the policy has remained with exactly the same DTD version, except that it has quietly changed the allowed values for some attributes in an incompatible manner. So I have to add a new policy file too. NB, it may not look like we've changed the client side, but we have, since the #ifdef for the external auth agent is no longer set.