IPv6-enabled XDM doesn't work with IPv4-only clients

[Peter Chubb <peter@chubb.wattle.id.au>]

I've installed the IPv6-enabled xdm, version 4.3.0-0ds4v2.0.ipv6.r0.1

It starts a local Xserver fine.

I can see it's listening to port 177 on the IPv4 network.

But it never seems to read anything from that port.

$ netstat -a | grep xdm
udp    3720      0 wombat.chubb.watt:xdmcp *:*  

Every time I cause the xterminal to generate an XDMCP `Manage Me'
request, the receive queue size increases.  But xdm never seems to
read the message from the socket.

Peter C