actions {
  new_stream {
    request_headers {
      headers {
        key: ":method"
        value: "CONNECT"
      }
      headers {
        key: ":authority"
        value: "foo.com:80"
      }
    }
    end_stream: false
  }
}
actions { quiesce_drain {} }
actions {
  stream_action {
    stream_id: 0
    response {
      headers {
        headers {
          key: ":status"
          value: "200"
        }
      }
    }
  }
}