We can. I think what that would do is this: For a request coming in with `X-Forwared-For: client.ip` (which was added by the `reverse.proxy` we're sitting behind), then the outgoing header would be:
* with `trust proxy`: `X-Forwarded-For: client.ip`
* without `trust proxy` : `X-Forwarded-For: client.ip, reverse.proxy`

Is that the intended behavior?