[Samba] bind-dns Folder Missing for Samba4 Setup in Ubuntu

[Christopher Wooley]

I am trying to setup samba to use the bind9 backend, but a folder is
missing in Samba, according to the WIKI page. This seems to be consistent,
as there are several files and folders that are not where they should be,
according to the wiki:
https://wiki.samba.org/index.php/BIND9_DLZ_DNS_Back_End

That page says there should be a folder at /usr/local/samba/bind-dns, but
it's not there. I've searched the entire root directory, but the bind-dns
folder doesn't exist. Anyone know where it is in Ubuntu and can you explain
its purpose?