Reverse Proxy Test does not handle URL correctly

[MarkEWaite (Mark Waite)]

@juhale

If nginx proxy-pass or location directive ends in slash, it will cause nginx to urldecode links and it will result in “It appears that your reverse proxy set up is broken”. If you need to end the proxy-pass or location directive with slash, check nginx documentation on how to disable url decoding.

That seems like a good pull request for you to submit to that documentation page. Are you willing to submit the pull request?