title: RewriteRule only when action=logout query string is NOT present
body: <p>I'm customizing my WordPress login page. Here's what I want to achieve:</p>
  
  <pre><code>/wp-login.php → /login  
  /wp-login.php?action=register → /login?action=register  
  /wp-login.php?action=logout&amp;_wpnonce=eaea03899c → NOT redirected  
  </code></pre>
  
  <p>I can't redirect the logout link because /login will not log the user out, only wp-login.php is able to do that.</p>
  
  <p>How can I achieve the above? Thanks!</p>