## Version 2.4.0

_2015-05-22_

 *  **Forbid response bodies on HTTP 204 and 205 responses.** Webservers that
    return such malformed responses will now trigger a `ProtocolException` in
    the client.

 *  **WebSocketListener has incompatible changes.** The `onOpen()` method is now
    called on the reader thread, so implementations must return before further

import java.io.InterruptedIOException
import java.net.CookieManager
import java.net.CookiePolicy
import java.net.HttpCookie
import java.net.HttpURLConnection
import java.net.InetAddress
import java.net.ProtocolException
import java.net.Proxy
import java.net.SocketTimeoutException
import java.net.UnknownHostException
import java.net.UnknownServiceException
import java.time.Duration
import java.util.Arrays