Adds both new & old authentication methods for servers through one function

NetClientHandler.java

    private String tryHandshake(String urlStr, String userOrSession) throws IOException {
        URL url = new URL(
            urlStr + /*joinserver.jsp*/ "?" +
             "user=" + this.mc.session.username +
            "&sessionId=" + this.mc.session.sessionId +
            "&serverId=" + userOrSession
        );

        // Create URL with timeout
        HttpURLConnection huc = (HttpURLConnection) url.openConnection();
        HttpURLConnection.setFollowRedirects(false);
        huc.setConnectTimeout(10 * 1000);
        huc.setReadTimeout(10 * 1000);
        huc.connect();

        // Get input stream & read result
        InputStream input = huc.getInputStream();
        InputStreamReader reader = new InputStreamReader(input);
        BufferedReader br = new BufferedReader(reader);
        String line = br.readLine();

        // Disconnect everything
        huc.disconnect();
        br.close();
        reader.close();

        // return result from input
        return line;
    }

    private Boolean handshakeOK(String handshakeResult) {
        return handshakeResult.equalsIgnoreCase("ok");
    }

    public void handleHandshake(Packet2Handshake handshakePacket) {
        String userOrSession = handshakePacket.username;
        if (userOrSession.equals("-")) {
            this.addToSendQueue(new Packet1Login(this.mc.session.username, 14));
        } else {
            String handshake = "Exception Unknown";

            String[] URLs = new String[]{
                    "http://session.minecraft.net/game/joinserver.jsp",
                    "http://www.minecraft.net/game/joinserver.jsp"
            };

            for(String url : URLs) {
                if (!handshakeOK(handshake)) {
                    try {
                        handshake = tryHandshake(url, userOrSession);
                    } catch (IOException e) {
                        handshake = e.getMessage();
                    }
                }
            }

            if(!handshakeOK(handshake))
                this.netManager.networkShutdown("disconnect.loginFailedInfo", handshake);
            else
                this.addToSendQueue(new Packet1Login(this.mc.session.username, 14));
        }
    }