global variable issue

[Draeli]

Working around Ekino/Sf2, I saw a problem in some case with plugin.
For example, in my case, I use "qTranslate Plus" (a plugin to offer multilanguage post), inside author use variable $request, that's means when I run a page using this plugin I haved a "bad argument" for "$kernel->terminate($request, $response);".
To avoid this, I suggest to say in documentation to wrap all (excluse use of course) content of app.php and app_dev.php in a function (not closure because I saw problem with that).
I my case I do :

<?php
use Symfony\Component\HttpFoundation\Request;

function run(){
// here all the stuff
}
run();

after this, no more problem :)

[rande]

Can you create a PR to update the documentation ?