title: How is the force reload of javascript/css done in Symfony?
body: <p>After reading this thread: <a href="https://stackoverflow.com/questions/118884/what-is-an-elegant-way-to-force-browsers-to-reload-cached-css-js-files">How to force browser to reload cached CSS/JS files?</a></p>
  
  <p>I would like to know if there is any built-in function  or easy way in Symfony that automatically forces a reload by appending a random querystring or timestamp to the link when it has discovered that javascript / css file has been modified. (Normally, people use the <code>use_javascript</code> function to generate the <code>&lt;script&gt;</code> tag)</p>