Comment 5 for bug 719144

I had a better idea but it was easier to JFDI than explain it:

https://code.launchpad.net/~leonardr/launchpadlib/silently-replace-edge-with-production/+merge/49794

I don't think this will actually save anyone's code if they do URL manipulation on EDGE_SERVICE_ROOT, but there's a chance it'll work.