Get project settings request gets rejected when hosted behind a proxy that complies with HTTP RFC

[hanikhan]

if you host RP behind an https corporate proxy, some rules on the edge layer might prevent requests from entering the system.

https://www.rfc-editor.org/rfc/rfc7231#page-24

A payload within a GET request message has no defined semantics; sending a payload body on a GET request might cause some existing implementations to reject the request.

[hanikhan]

opened a PR to fix this: #213

[HardNorth]

@hanikhan, merged, thank you!