[libvirt] update: dnsmasq and dynamic dns for IPv6

[Gene Czarcinski]

I have done a bunch of testing and NetworkManager does not send the 
client-host's name to the server so that an IPv6 dns entry can occur.  I 
have dupicated the problem with dnsmasq and bind/dhcp.

This has been reported: https://bugzilla.redhat.com/show_bug.cgi?id=858327

Now back to figuring out how to get IPv6 dhcp support into libvirt.

Gene