The "nodns" option in pump.conf is the documented way to prevent
/etc/resolv.conf from being overwritten.  However using this option also
seems to disable the "--lookup-hostname" command line option.  Therefore
a hostname never gets set if you use "nodns".  This is a problem for folks
who run named (perhaps as a caching-only nameserver.) 

IMHO, the "nodns" flag should not disable setting the hostname when
--lookup-hostname is specified, OR there should be an option that means
"don't overwrite /etc/resolv.conf", with no other side effects.

Thank you.