[rbldnsd] Pre-announce: rbldnsd-0.84p2

[Michael Tokarev]

Experimental version, after rbldnsd was in real use
as one of 3 nameservers for DSBL.org lists.

Rbldnsd will now return positive answer to AAAA queries
performed by IPv6-enabled sendmail, and to PTR and CNAME
queries, but answer section will contain no records (as
in "valid name but no data of requested type").  This is
how BIND works.  This is currently a hack to make BIND
and Sendmail happy, I'm seeking for a better solution
to this.

Can someone tell me what exactly should a nameserver
return in such a strange situations?  Should it return
AUTHORITY section or may it be omitted as DJB's rbldns
does (and the same with ADDITIONAL section with nameserver
data)?  Should SOA be present in all replies, incl.
negative ones (NXDOMAIN)?  Should NS information be
propagated from zone.example.com to 2.0.0.127.zone.example.com
directly in answer section (if asked for SOA), or it is
sufficient to return it in AUTHORITY section as BIND does?
And, finally, where to get that SOA/NS and how to specify
those values so it will be _easy_ to work with rbldnsd?
`generic' "zone type" of rbldnsd seems to be a bit odd for
this purpose - this is why it was experimental and I asked
for help defining a right way.

http://www.corpit.ru/mjt/rbldnsd/

/mjt