ipropd-master.c:make_listen_socket only binds to AF_INET

[juhaj]

On an IPv6-only host (or dual-stack) ipropd-master fails to bind to any IPv6 address. On an IPv6-only host, this is obviously a show-stopper, but it is also a show-stopper for IPV6-only ipropd-slaves.

Looks like ipropd-master does not even try, the only IP socket it opens is opened in make_listen_socket and the socket is unconditionally AF_INET:

fd = socket (AF_INET, SOCK_STREAM, 0);

I'm filing this as a bug, not feature request, because based on Changelogs, Heimdal supports IPv6 (and the client tools and kdc do so seemingly fine, just not ipropd).