[Libvir] Support non-bridged network configs

The current code for parsing/serializing VIFs only really deals with the default bridged networking config for Xen. So if one uses network-route or network-nat it completely breaks. There is also no support for dealing with IP address in the XML / SEXPR. The attached patch fixes both of these issues, so we should be able to deal with any of the standard Xen networking configs. Regards, Dan. -- |=- Red Hat, Engineering, Emerging Technologies, Boston. +1 978 392 2496 -=| |=- Perl modules: http://search.cpan.org/~danberr/ -=| |=- Projects: http://freshmeat.net/~danielpb/ -=| |=- GnuPG: 7D3B9505 F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 -=|