Description of problem:
NodeJS server doesn't seem to be able to access client's IP address when using websocket protocol.

Given a NodeJS server:

    let ws = require("ws");
    let server = new ws.Server({host: process.env.OPENSHIFT_NODEJS_IP, port: 8080});

    server.on('connection', function connection(conn) {
        console.log(conn.upgradeReq.headers);
    });

Following headers are logged:
    connection, upgrade, sec-websocket-version, sec-websocket-key, origin, host
    Host header contains reverse proxy's ip:port, x-forwarded-for header is missing.