Ractchet with pthread not working
I try to do a long operation (an unarchiving) inside a Ratchet server.
For that, I have recompile PHP 5.6.8 with ZTS support and added pthread module.

In launch the Ratchet server with this code

```
require '../vendor/autoload.php';
$app = new Ratchet\App('192.168.56.101', 4242, '0.0.0.0');
$app->route('/test/{id}', new CommonDashboard\webSocket\TestWebSocket(), array('*'));
$app->run();
```

And my class behind

```
namespace CommonDashboard\webSocket;
use Ratchet\MessageComponentInterface;
use Ratchet\ConnectionInterface;

class TestThread extends \Thread{
    public function __construct(){}
    public function run(){
        sleep(3); // Should be an unarchiving
    }
}

class TestWebSocket implements MessageComponentInterface {
    protected $clients;

    public function __construct() {
        $this->clients = new \SplObjectStorage;
    }

    public function onOpen(ConnectionInterface $conn) {
        $this->clients->attach($conn);
        $query = $conn->WebSocket->request->getQuery();
        echo "New connection! ({$conn->resourceId} - {$query['id']})\n";
    }

    public function onMessage(ConnectionInterface $from, $msg) {
        $numRecv = count($this->clients) - 1;

        echo "Start process for $from->resourceId \n";

        $test = new TestThread();
        $test->start(); //Should be non blocking

        echo "End process for $from->resourceId \n";

        foreach ($this->clients as $client) {
            if ($from !== $client) {
                // The sender is not the receiver, send to each client connected
                $client->send($msg);
            }
        }
    }

    public function onClose(ConnectionInterface $conn) {
        $this->clients->detach($conn);
        echo "Connection {$conn->resourceId} has disconnected\n";
    }

    public function onError(ConnectionInterface $conn, \Exception $e) {
        echo "An error has occurred: {$e->getMessage()}\n";
        $conn->close();
    }

}
```

My problem is that the `thread->start()` block my server. Each long process are not executed in the same times.

So do you have any ideas ?
Thanks in advance for your help
