title: How to add confirmation checkbox for FOSUserbundle Registration
body: <p>I am using the FOSUserBundle, how do i add a checkbox that has to be selected for the user to create an account. </p>
  
  <p>Does FOS already cater for this, and perhaps i just have to add a line in the config file, or maybe i have to change the controller some how. </p>
  
  <p>I have added a link to a picture to better explain what i need to do </p>
  
  <p><img src="https://i.stack.imgur.com/7Rve7.png" alt="http://lescouverts.com/Images/errer-fos.png"></p>
  
  <p>This is really important, as users must accept the terms and conditions before registration.</p>