VNC: Add 'family' key It contains the socket adress family name, like "ipv4" or "ipv6". This is useful for clients so that they can interpret the 'host' key reliably. Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>