x11/gdm: default IPv6 disables IPv4 for xdmcp

[Boris Samorodov]

Hello All!


Way back before gnome-2.14 IPv6 and IPv4 were mutual exclusive.
Current gdm-2.16.4 behaves the same:

- gdm built with defaults listens only at udp6:
%netstat -a | grep xdm
udp6       0      0  *.xdmcp                *.*

- disabling IPv6 helps to listen at udp4.


WBR
-- 
Boris Samorodov (bsam)
Research Engineer, http://www.ipt.ru Telephone & Internet SP
FreeBSD committer, http://www.FreeBSD.org The Power To Serve