func serverDefault() *tls.Config {
	return &tls.Config{
		// Avoid fallback to SSL protocols < TLS1.0
		MinVersion:               tls.VersionTLS10,
		PreferServerCipherSuites: true,
		CipherSuites:             tlsconfig.DefaultServerAcceptedCiphers,
	}
}
func serverDefault() *tls.Config {
	return &tls.Config{
		// Avoid fallback to SSL protocols < TLS1.0
		MinVersion:               tls.VersionTLS10,
		PreferServerCipherSuites: true,
		CipherSuites:             tlsconfig.DefaultServerAcceptedCiphers,
	}
}
// this is cloned from docker/go-connections because upstream docker has changed
// it and make deps here fails otherwise.
// We'll drop this once we upgrade to docker 1.13.x deps.