Assume you've got a full set of packages. Well, we could selectively erase packages for which the package signature does no longer match what's in the ports tree.
That way, this makes for a quick rebuild of all ports that depend on something after the something changed. What do you people think ? useful ? or should we just rely on bulk-builds and careful hand checking as we've done for years ? (I'm not advocating replacing bulk-builds from scratch, mind you).
