[Samba] NS records for all DCs, verifying and creating a DC DNS records

[Zhuchenko Valery]

Hi, all!

There is no check of NS records in this document 
https://wiki.samba.org/index.php/Verifying_and_Creating_a_DC_DNS_Record

For example, with two DCs at myzone

$ host -t NS myzone dc1 (or dc2, or myzone)
must return two records:

myzone name server dc1.myzone.
myzone name server dc2.myzone.

$ host -t NS _msdcs.myzone dc1 (or dc2, or myzone)
must return two records:

_msdcs.myzone name server dc1.myzone.
_msdcs.myzone name server dc2.myzone.

Is it right? Or existence of these records is optional?

Best regards, Valery