e following utility components
  by nesting a corresponding element inside your <strong>Engine</strong>
  element:</p>
  <ul>
  <li><a href="realm.html"><strong>Realm</strong></a> -
      Configure a realm that will allow its
      database of users, and their associated roles, to be shared across all
      <a href="host.html">Hosts</a> and <a href="context.html">Contexts</a>
      nested inside this Engine, unless overridden by a
      <a href="realm.html">Realm</a> configuration at a lower level.</li>
  <