Minimize the amount of code loaded on each page even further
>>> [!note] Migrated issue
<!-- Drupal.org comment -->
<!-- Migrated from issue #948454. -->
Reported by: [wim leers](https://www.drupal.org/user/99777)
>>>
<p>- Move the logic for basic mode ("Origin Pull mode" in the UI) into cdn.basic.inc<br>
- Move the logic for advanced mode ("File Conveyor mode" in the UI) into cdn.advanced.inc<br>
- Use require() instead of require_once() to load include files, as per <span class="drupalorg-gitlab-issue-link project-issue-status-info project-issue-status-5"><a href="https://www.drupal.org/project/drupal/issues/320493" title="Status: Closed (won't fix)">#320493: Use require() not require_once() in the registry</a></span><br>
- Create a cdn_include() function that uses require() and makes it easier (and more elegant) to load CDN module's include files</p>
issue