[Samba] Samba 4 Bind DNS on CentOS 7

[John Gardeniers]

Can anyone point me to instruction for setting up Bind to work with 
Samba 4 on CentOS 7? I know there are some instruction at 
https://wiki.samba.org/index.php/DNS_Backend_BIND but they're incomplete 
when using the Sernet repo. In particular, it refers to 'include 
"/usr/local/samba/private/named.conf";' but that file doesn't exist at 
any location on my system.

Is this a generic file that I can copy from some other 
place/system/person, or is it a dynamically generated, system specific, 
file created during the install? I thought I might be able to set up an 
Ubuntu server and grab it from there but, like CentOS, samba-ad doesn't 
exist in the standard repos, which puts me back at Sernet, with nothing 
gained. Is there a distro which actually has samba-ad in the standard repos?

regards,
John