Update for 2.4

api.html

@@ -403,6 +403,11 @@ void setup() {
             to them in one go, such as the Arduino Wifi Shield.</p>
             <p>Default: undefined (complete packet passed in each write call)</p>
         </dd>
+        <dt><code>MQTT_SOCKET_TIMEOUT</code></dt>
+        <dd>Sets the timeout when reading from the network. This also applies as
+            the timeout for calls to <code>connect</code>.
+            <p>Default: 15 seconds</p>
+        </dd>
     </dl>
 </section>