Explain dump server usage outside of Symfony

Took hours for me to figure out how to use the dump server outside of Symfony, because there is no mention that it can be done, and one must use the ServerDumper class to make it work.

Author: skunkbad

components/var_dumper.rst

@@ -119,6 +119,20 @@ Inside a Symfony application, the output of the dump server is configured with
 the :ref:`dump_destination option <configuration-debug-dump_destination>` of the
 ``debug`` package.
 
+Outside a Symfony application, one is required to use the ServerDumper class:
+
+    require __DIR__.'/vendor/autoload.php';
+    
+    use Symfony\Component\VarDumper\VarDumper;
+    use Symfony\Component\VarDumper\Cloner\VarCloner;
+    use Symfony\Component\VarDumper\Dumper\ServerDumper;
+    
+    VarDumper::setHandler(function ($var) {
+      $cloner = new VarCloner();
+      $dumper = new ServerDumper('tcp://127.0.0.1:9912');     
+      $dumper->dump($cloner->cloneVar($var));
+    });
+
 DebugBundle and Twig Integration
 --------------------------------