Be more specific about referrers and integrity

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@@ -2481,6 +2481,7 @@ a.setAttribute('href', 'https://example.com/'); // change the content attribute
      <li><dfn data-x-href="https://fetch.spec.whatwg.org/#concept-header-list-get-structured-header">getting a structured field value</dfn></li>
      <li><dfn data-x="concept-header-list-set" data-x-href="https://fetch.spec.whatwg.org/#concept-header-list-set">set</dfn></li>
      <li><dfn data-x="concept-header-list-get-decode-split" data-x-href="https://fetch.spec.whatwg.org/#concept-header-list-get-decode-split">get, decode, and split</dfn></li>
+     <li><dfn data-x="concept-header-name" data-x-href="https://fetch.spec.whatwg.org/#concept-header-name">header name</dfn></li>
      <li><dfn data-x="concept-fetch-terminate" data-x-href="https://fetch.spec.whatwg.org/#concept-fetch-terminate">terminate</dfn></li>
      <li><dfn data-x-href="https://fetch.spec.whatwg.org/#cross-origin-resource-policy-check">cross-origin resource policy check</dfn></li>
      <li>the <dfn data-x-href="https://fetch.spec.whatwg.org/#requestcredentials"><code>RequestCredentials</code></dfn> enumeration</li>
@@ -25476,11 +25477,18 @@ document.body.appendChild(wbr);</code></pre>
    "<code data-x="">GET</code>", return null.</p></li>
 
    <li>
-    <p>If <var>req</var>'s <span data-x="concept-request-header-list">header list</span>
-    <span data-x="list is empty">is not empty</span>, return null.</p>
+    <p><span data-x="list iterate">For each</span> <var>header</var> in <var>req</var>'s
+    <span data-x="concept-request-header-list">header list</span>, if <var>header</var>'s
+    <span data-x="concept-header-name">name</span> is not "<code data-x="">Cache-Control</code>",
+    "<code data-x="">If-Modified-Since</code>", "<code data-x="">If-None-Match</code>",
+    "<code data-x="">Origin</code>",  "<code data-x="">Pragma-Agent</code>",
+    "<code data-x="">Purpose</code>", "<code data-x="">Referer</code>", or
+    "<code data-x="">User-Agent</code>", return null.</p>
 
-    <p>Once it becomes possible to define a list of headers for preloads, the two lists are to be
-    compared.</p>
+    <p class="note">Once it becomes possible to define a list of headers for preloads, the two lists
+    can be compared to get a more definite match. However, the <span
+    data-x="concept-request-referrer">referrer</span> of the request is not a preload match
+    condition, as some referrers such as style URLs are not known when preloading.</p>
    </li>
 
    <li><p>Let <var>doc</var> be <var>win</var>'s
@@ -25509,13 +25517,22 @@ document.body.appendChild(wbr);</code></pre>
        <li><p><var>resource</var>'s <span data-x="preloaded-resource-mode">mode</span> is
        <var>req</var>'s <span data-x="concept-request-mode">mode</span></p></li>
 
-       <li><p><var>resource</var>'s
-       <span data-x="preloaded-resource-integrity-metadata">integrity metadata</span> is
-       <var>req</var>'s
-       <span data-x="concept-request-integrity-metadata">integrity metadata</span>, or
-       <var>req</var>'s
-       <span data-x="concept-request-integrity-metadata">integrity metadata</span> is an empty
-       string</p></li>
+       <li>
+        <p><var>resource</var>'s
+        <span data-x="preloaded-resource-integrity-metadata">integrity metadata</span> is
+        <var>req</var>'s
+        <span data-x="concept-request-integrity-metadata">integrity metadata</span>, or
+        <var>req</var>'s
+        <span data-x="concept-request-integrity-metadata">integrity metadata</span> is an empty
+        string</p>
+
+        <p class="note">User-agents can decide to allow resources to be used if their data matches
+        the request's <span data-x="concept-request-integrity-metadata">integrity metadata</span>,
+        even if the preloaded request had a different
+        <span data-x="preloaded-resource-integrity-metadata">integrity metadata</span>, however
+        this is an uncommon case (e.g. both a link and an image specified their integrity metadata
+        for the same data using a different hashing algorithm).</p>
+       </li>
 
        <li><p><var>resource</var>'s
        <span data-x="preloaded-resource-credentials-mode">credentials mode</span> is