* will fail and no connection will be established.
   */
  fun requestClientAuth() {
    this.clientAuth = CLIENT_AUTH_REQUESTED
  }

  /**
   * Configure the server to [need client auth][SSLSocket.setNeedClientAuth]. If the
   * client presents a certificate that is [trusted][TrustManager] the handshake will
   * proceed normally. If the client presents an untrusted certificate or no certificate at all the