[Samba] Demote a dead PDC: residuals in "DNS" console

[Ole Traupe]

Having joined a new Secondary DC to my domain and manually created the 
DNS A record and the CNAME record as described here
https://wiki.samba.org/index.php/Check_and_fix_DNS_entries_on_DC_joins,
I find that my PDC also has an A record in "_msdcs.my.domain.com", which 
the new Secondary DC has not.

Is this a problem? Should I create this record as well?

Ole