// Allow clients to disable http2 if needed.
	if s := os.Getenv("DISABLE_HTTP2"); len(s) > 0 {
		klog.Info("HTTP2 has been explicitly disabled")
	} else if allowsHTTP2(t) {
		if err := configureHTTP2Transport(t); err != nil {
			klog.Warningf("Transport failed http2 configuration: %v", err)
		}
	}
	return t
}

func readIdleTimeoutSeconds() int {
	ret := 30