Add help text or documentation on CDN mapping patterns
>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #2667156. --> Reported by: [joelpittet](https://www.drupal.org/user/160302) >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>I was noticing I had put in just <code>abc123.cloudfront.net</code> in the CDN mapping and didn't see any examples in the help text or any documentation of the format or recommendations. I took hints from <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/cdn/-/work_items/1115686" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/cdn/-/work_items/1115686</a></span> and the project homepage screenshot that it should have been with the protocol included. </p> <p><code>http://abc123.cloudfront.net</code>, the strange thing is the SSL mapping is on a different page and only shows up if you enable the support for it, but doesn't seem to need the mapping as long as that is checked off as SSL support the previous screen's <code>http://abc123.cloudfront.net</code> would be converted to <code>https://abc123.cloudfront.net</code></p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <ol> <li>Move the SSL section below the mapping so the original mapping is in visual context.</li> <li>Explain the need of the protocol and how it will be replaced or allow for protocol less mappings(which may have previously worked)</li> <li>Explain the pattern in help text after the pipe <code>|</code></li> <li>Explain what happens without the piped file extensions. </li></ol> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <p>Decide which documentation pieces would be the right way forward.</p> <h3 id="summary-ui-changes">User interface changes</h3> <p>Moving form fields to the same page.</p> <h3 id="summary-api-changes">API changes</h3> <h3 id="summary-data-model-changes">Data model changes</h3> <p>Follow-up to <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/cdn/-/work_items/1115686" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/cdn/-/work_items/1115686</a></span></p> > Related issue: [Issue #1115686](https://www.drupal.org/node/1115686)
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