[Samba] per share way to not follow msdfs links

[Chad W Seys]

> Yep, sounds like a bug indeed. You still have the option to edit the smb.conf
> on the server side if you want to use smb2+.

Good to keep in mind.
I'm speculating leaving 'nodfs' out of smb2+ was purposeful.  Originally 
it was a workaround for Samba 3.something . Maybe the cifs authors were 
hoping to leave the legacy code behind?

Thanks again for your suggestions!
Chad.