title: Rewrite domain, but still use index.php
body: <p>Current code to use index.php for all urls :</p>
  
  <p><code>RewriteRule ^(.*)$ ./index.php</code></p>
  
  <p>But for one special case, I want to make url </p>
  
  <p><code>http://domain.com/s/this_changes</code> to call actually
  <code>http://domain.com/steps/step/this_changes</code>. </p>
  
  <p>I tried adding : </p>
  
  <p><code>RewriteRule ^./s/$ ./steps/step/$1</code>, but it gives an error <code>500</code>.</p>