I found that with extra parameter -rfbportv6 -1 added, libvncserver0 wouldn't
start it's own socket
listening on ::1:5900
x11vnc -shared -many -localhost -rfbport 5901 -rfbportv6 -1
08/02/2013 12:20:26 Listening for VNC connections on TCP port 5901
08/02/2013 12:20:26 rfbListenOnTCP6Port error in getaddrinfo: Servname not
supported for ai_socktype
08/02/2013 12:20:26 Listening also on IPv6 port 5901 (socket 10)
x11vnc -no6 -shared -many -localhost -rfbport 5901 -rfbportv6 -1
08/02/2013 12:21:52 Listening for VNC connections on TCP port 5901
08/02/2013 12:21:52 rfbListenOnTCP6Port error in getaddrinfo: Servname not
supported for ai_socktype
