Comment 4 for bug 632489

It's a pretty painful thought to consider a web server that is connecting to 50 database servers, and discovering all those and typing in their IPs. Maybe we should have a -r option that specifies to reverse the local-ness: all the IP addresses specified in -l, or gathered by looking at the local devices, are considered to be remote, i.e. the source of requests, not the target of the requests.