* multicast addresses for XDMCP, where X in the prefix may be replaced
* by any valid scope identifier, such as 1 for Node-Local, 2 for Link-Local,
* 5 for Site-Local, and so on. We set the default here to the Link-Local
* multicast addresses for XDMCP, where X in the prefix may be replaced
* by any valid scope identifier, such as 1 for Node-Local, 2 for Link-Local,
* 5 for Site-Local, and so on. We set the default here to the Link-Local