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

[Miguel Medalha]

> 
> Internal AD winbind implementation doesn't care about SAM posixAccount
> mappings in sam.ldb - it reads the RFC2307 mappings from idmap.ldb, 
whereas
> member servers read the maps from SAM.
> This creates a nice clash of UID's between DC and members, even worse - it
> creates a clash between idmap and sam on the DC.
> I'm right now trying to conceive a plan to solve this crap.
> 

What I was asking was if the internal one was IN FACT being disabled or if 
it SHOULD HAVE been disabled but wasn't.