web: don't set X-Forwarded-Proto when no request TLS Options are set

Signed-off-by: Jens Langhammer <jens.langhammer@beryju.org>

internal/web/web_proxy.go

@@ -18,8 +18,6 @@ func (ws *WebServer) configureProxy() {
 		}
 		if req.TLS != nil {
 			req.Header.Set("X-Forwarded-Proto", "https")
-		} else {
-			req.Header.Set("X-Forwarded-Proto", "http")
 		}
 	}
 	rp := &httputil.ReverseProxy{Director: director}