[Libvir] Autostarting guests and networks

Hey, We need some way to have libvirtd automatically start guests and networks. We had said we should have autostart directories containing config files of guests/networks which should be autostarted. One problem I see with that is that we'd need a new API to define autostart configs. So, I suggest we add an "autostart" flag to the toplevel element of the configs. We could discuss this one at length and I, for one, don't like using the XML format as an API like this, but ... comments? Cheers, Mark.