[dns-operations] operational impact of empty MNAME and RNAME?

[Stephane Bortzmeyer]

On Mon, Oct 02, 2006 at 11:22:23AM -0400,
 Joe Abley <jabley at ca.afilias.info> wrote 
 a message of 18 lines which said:

> For a zone which definitively doesn't support dynamic updates, the
> MNAME field in the SOA RDATA seems extraneous.

I know at least one TLD which uses it to indicate on which machine ran
the zone generator (they combine zone generation at some name servers
and AXFR to the rest, so the SOA can help them to debug).