title: url_for in backend for frontend - Symfony
body: <p>i made in frontend nice url with symfony routing.yml. In frontend i can use for example:</p>
  
  <pre><code>url_for('@news', $news);
  </code></pre>
  
  <p>this generate for me:</p>
  
  <pre><code>http://mysite.com/frontend_dev.php/news/nice-title/1
  </code></pre>
  
  <p>but if i use this in backend i have:</p>
  
  <pre><code>http://mysite.com/backend_dev.php/news/nice-title/1
  </code></pre>
  
  <p>is possible generate these link in backend for frontend?</p>