@Override
    public String getOriginalProtocol() {
        String proto = getHeaders().getFirst(HttpHeaderNames.X_FORWARDED_PROTO_VERSION);
        if (proto == null) {
            proto = getProtocol();
        }
        return proto;
    }
The originally request host. This will NOT include port.

The Host header may contain port, but in this method we strip it out for consistency - use the
getOriginalPort method for that.
zuul-core/src/main/java/com/netflix/zuul/message/http/HttpRequestMessageImpl.java