[PATCH v2] ct: add ICMPv6 support

[Holger Eitzenberger]

> > currently the ICMPv6 conntrack objects in libnl are without type, code
> > and ID.  This e. g. is the output of nl_object_dump() without the patch:
> > 
> >   ipv6-icmp ::1 <-> ::1 
> >   id 0xdd0871f0 family inet6 timeout 30s <NOREPLY,SNAT_INIT,DNAT_INIT>
> > [...]
> 
> Looks good. Applied, thanks Holger.

Thanks!