i need backup forwarders
i plan to run bind9 w/o a config file on 127.0.0.1, on a lot of hosts. sometimes these hosts will have the ability to reach the wider internet, in which case i want no forwarders, just go do the iterations. however, when behind a firewall, my dhcp-assigned recursive name servers may be the only ones i can reach, and i'll want my bind9 instance on 127.0.0.1 to then go into forwarders mode.
in all cases, my resolv.conf (or windows registry, or whatever) will be set to the static value of 127.0.0.1. the only variability is whether the bind9 recursive server running on 127.0.0.1 will know to use forwarders when it has to, but only when it has to. i realize that learning the dhcp-assigned recursive server names is a non-portable task, but i'm willing to say "go ask your own DHCP request" until that problem has been sorted out.