samba - Sep 2018 - Purpose of /usr/local/samba/bind-dns directory

I noticed that somewhere along the 4.8.x series a new 
"/usr/local/samba/bind-dns" directory is being created on install. It
is
created, and sits there empty, even when the bind DNS server is not 
used. This happens on an AD member server as well. Does this directory 
serve some purpose even when bind is not used or was it an oversight?