Not working with cloudflare

[Revetter]

I've been using this library for a while with succes on Bittrex, a cryptocurrency exchange with SignalR websocket. They have reactivated cloudflare protection on their websocket as well and it is now not working with my program which uses this library.
This person manages to do so: https://github.com/tompetko/SignalR.WebSocketSharpTransport but I have no idea how to use that library in C++.

I believe this is why the pull request was made to make the user agent configurable.