[Samba] RFC2307 attributes not being read by DC2 in 4.2.1

[Miguel Medalha]

> with a samba 4.2.1 AD DC you automatically use the separate 'winbindd' 
> deamon and the 'winbind' deamon built into the samba daemon should be 
> ignored. There is no way that I know to 'disable' the winbind built into 
> samba, but there is a way to turn it on and turn off 'winbindd', which 
> is the way I suggested.
> 

The Samba 4.2 release notes contains the following:

If required the old internal winbind can be activated by setting
'server services = +winbind -winbindd'.  Upgrading users with a server
services parameter specified should ensure they change 'winbind' to
'winbindd' to obtain the new functionality.

So what I was proposing was the equivalent (-winbind +winbindd) of the 
inversion of this parameter and see what happens.
Since you are admitting this can be a bug in Samba, why not a bug in the 
turning the winbind types on and off?

Maybe I am very wrong, but I only wanted to help with something that is 
very easy to test.