[Samba] Secondary DNS - samba 4 domain

[Ryan Whelan]

How do I do about setting up a second samba DC as a DNS server?  I have 2
DCs in the domain (setup via the How-to on the wiki)

If I try to follow the steps I used for the first controller on the second,
bind won't start because /usr/local/samba/private/dns hasn't been created
or populated. (I'm using the dlz backend).  Searching the wiki has provided
nothing.  How to I create the needed ldb zone files?  Do i just copy them
from the first machine?