[Samba] Failover DC did not work when Main DC failed

[Kris Lou]

>  From a *nix domain member (i.e. client, not DC), using winbind:
> > winbind --getdcname=<domain>
> > winbind --ping-dc
> Ah, I think you mean 'wbinfo' not 'winbind' as in 'wbinfo
> --getdcname=<domain>' and it does work on a Samba DC ;-)
>
>
Erg, yes, that.  It's still Monday morning over here, and I'm claiming
dejected sportsball hangover as my official excuse.  (not really).