title: .htaccess rewrite base URL up one directory level
body: <p>I have an established Drupal installation at <code>example.com/drupal</code> - and now I need to move the installation up one level to the domain root.</p>
  
  <p>So the rewrite rule I need is to redirect all existing URLs - e.g. <code>example.com/drupal/some_section/somepage</code> to <code>example.com/some_section/somepage</code> etc.</p>
  
  <p>How do I do this?</p>