The socket family to create contexts for. Use %G_SOCKET_FAMILY_INVALID
for any or %G_SOCKET_FAMILY_IPV4 for IPv4 contexts or
%G_SOCKET_FAMILY_IPV6 for IPv6 contexts
Optional port
port?:number
Port the contexts listen on, or 0 if you don't care what
port is used by #GUPnPContext objects created by this object.
The socket family to create contexts for. Use %G_SOCKET_FAMILY_INVALID for any or %G_SOCKET_FAMILY_IPV4 for IPv4 contexts or %G_SOCKET_FAMILY_IPV6 for IPv6 contexts