title: add middleware to all routes but a few
body: <p>how can I add middleware to all possible routes except for these that match a given expression?</p>
  
  <p>I know how to add a middleware to ones that match an expression:</p>
  
  <pre><code>app.all('/test/*', requireLogin);
  </code></pre>
  
  <p>but I want to require login in all routes except for a few that have a specific prefix in their paths.</p>