ctdb and set-auth-user

[tridge at samba.org]

Charles,

 > net ads join works just like normal. 
 > wbinfo --set-auth-user=dom\\username%pass gives me the error:
 > "error storing username"
 > We require the auth-user to access our AD servers.

I've reproduced the problem, now we just need to find a fix that isn't
too ugly :-)

The problem is that wbinfo doesn't have an event context. I'll discuss
this with Volker.

Cheers, Tridge