> Is there anyway to query a DNS server in such a way that it produces a list
> of all the domains for which it is authoritative?

not that I am aware.

> I'm trying to set up a slave configuration of a DNS server, but everytime I
> add a domain to the primary server, I find that I have to manually update
> the config on the slave server as well to reflect the new domain as well.
> Is there anyway I can set up my Bind slave server as a "mirror" of the
> master server?

Not absolutely sure what you mean by "mirror", as a slave config is not
the exact same as a master config. Similar but different.

If you are wanting a true slave, you will have to either update the
slave config manually or thru some scripting automation.