title: Nginx syntax problem '~*'
body: <p>I have at condition checking to see if user has a cookie like this:</p>
  
  <pre><code> if ($http_cookie ~* "developer=true" ) {
     ...
   }
  </code></pre>
  
  <p>I'm not familiar with the <code>~*</code> syntax, I assume that that means if it 'contains', but what about the opposite? like what if I wanted to check if <code>$http_cookie</code> doesn't contain that cookie?</p>