QUdpSocket: Convert snippet to functor connect

Change-Id: Ice210b979a1dd948cd8d95003bd50a4b71d91852
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/network/doc/snippets/code/src_network_socket_qudpsocket.cpp

@@ -54,8 +54,8 @@ void Server::initSocket()
     udpSocket = new QUdpSocket(this);
     udpSocket->bind(QHostAddress::LocalHost, 7755);
 
-    connect(udpSocket, SIGNAL(readyRead()),
-            this, SLOT(readPendingDatagrams()));
+    connect(udpSocket, &QUdpSocket::readyRead,
+            this, &Server::readPendingDatagrams);
 }
 
 void Server::readPendingDatagrams()