Base <meta name="referrer" content="default"> on the RP spec

Follows w3c/webappsec-referrer-policy#142, which
introduces a spec-level "default referrer policy" HTML can point to.

This is a normative change since the new default referrer policy defined
in the Referrer Policy spec is "strict-origin-when-cross-origin",
instead of the previous "no-referrer-when-downgrade" set in HTML.

Author: krgovind

source

@@ -2578,6 +2578,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
              "<dfn data-x="referrer-policy-no-referrer-when-downgrade" data-x-href="https://w3c.github.io/webappsec-referrer-policy/#referrer-policy-no-referrer-when-downgrade"><code>no-referrer-when-downgrade</code></dfn>",
              "<dfn data-x="referrer-policy-origin-when-cross-origin" data-x-href="https://w3c.github.io/webappsec-referrer-policy/#referrer-policy-origin-when-cross-origin"><code>origin-when-cross-origin</code></dfn>", and
              "<dfn data-x="referrer-policy-unsafe-url" data-x-href="https://w3c.github.io/webappsec-referrer-policy/#referrer-policy-unsafe-url"><code>unsafe-url</code></dfn>" referrer policies</li>
+     <li>The <dfn data-x-href="https://w3c.github.io/webappsec-referrer-policy/#default-referrer-policy">default referrer policy</dfn></li>
     </ul>
 
     <p>The following terms are defined in <cite>Mixed Content</cite>: <ref spec=MIX></p>
@@ -14119,7 +14120,7 @@ interface <dfn>HTMLMetaElement</dfn> : <span>HTMLElement</span> {
            <td><code data-x="referrer-policy-no-referrer">no-referrer</code>
           <tr>
            <td><code data-x="">default</code>
-           <td><code data-x="referrer-policy-no-referrer-when-downgrade">no-referrer-when-downgrade</code>
+           <td>the <span>default referrer policy</span>
           <tr>
            <td><code data-x="">always</code>
            <td><code data-x="referrer-policy-unsafe-url">unsafe-url</code>