[Samba] Provisioning command line args

[John]

Hello, I'm trying to script an installation and can't find the 
command-line argument to "samba-tool domain provision" to specify the 
DNS forwarder. I have tried "samba-tool domain provision --help" but I 
couldn't see such an option there. Does that mean there isn't one ?

I also tried to use the "samba-tool --option=option" construct 
(described on 'man samba-tool') to set the dns forwarder after the 
provision but I can't work out how to constuct the parameter.

I'd appreciate a nudge in the right direction...

Thanks,
John