title: HTML in Symfony2 form labels instead of plain text
body: <p>I am trying to implement something like this:</p>
  
  <pre><code>&lt;div&gt;
      &lt;input type="checkbox" name="checkbox" id="checkbox_id" /&gt;
      &lt;label for="checkbox_id"&gt;I agree to the &lt;a href="/tos"&gt;Terms of Service&lt;/a&gt;&lt;/label&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>The closest I've come to implement  this is through:</p>
  
  <pre><code>&lt;div&gt;
      {{ form_widget(form.agreeWithTos) }}
      &lt;label for="{{ form.agreeWithTos.vars.id }}"&gt;I agree to the &lt;a href="#"&gt;Terms of Service&lt;/a&gt;&lt;/label&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Is there a better way? Having to specify {{ form.agreeWithTos.vars.id }} is inelegant. :)</p>