Fix Empty Header Handling (#148)

SHA: a163e1d
Reason: push, by arichiv

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

index.html

@@ -6,7 +6,7 @@
   <link href="https://www.w3.org/StyleSheets/TR/2021/cg-draft" rel="stylesheet">
   <meta content="Bikeshed version 077497365, updated Thu Mar 2 15:15:29 2023 -0800" name="generator">
   <link href="https://wicg.github.io/client-hints-infrastructure" rel="canonical">
-  <meta content="a18ab02696e1a76baa960cf4a7853b95450e0a9a" name="document-revision">
+  <meta content="a163e1d3ece339432e75a9aeea514aa865f25bb2" name="document-revision">
 <style>
 table, th, td { border: 1px black solid; }
 thead {background-color: yellow; }
@@ -465,7 +465,7 @@
   <div class="head">
    <p data-fill-with="logo"><a class="logo" href="https://www.w3.org/"> <img alt="W3C" height="48" src="https://www.w3.org/StyleSheets/TR/2021/logos/W3C" width="72"> </a> </p>
    <h1 class="p-name no-ref" id="title">Client Hints Infrastructure</h1>
-   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2023-03-08">8 March 2023</time></p>
+   <p id="w3c-state"><a href="https://www.w3.org/standards/types#CG-DRAFT">Draft Community Group Report</a>, <time class="dt-updated" datetime="2023-03-09">9 March 2023</time></p>
    <div data-fill-with="spec-metadata">
     <dl>
      <dt>This version:
@@ -654,8 +654,8 @@ <h3 class="heading settled" data-level="3.2" id="accept-ch-cache-definition"><sp
 since sites can use each of the hints as a bit set on the client, and that information will be
 communicated to them on every request. As such, a user agent MUST evict that
 cache whenever the user clears their cookies or when session cookies expire.</p>
-   <p>A site can clear the browser’s <code>Accept-CH</code> cache for its origin by sending an empty <code>Accept-CH</code> header in a response with no other <code>Accept-CH</code> headers. This sets the origin’s <a data-link-type="dfn" href="#client-hints-set" id="ref-for-client-hints-set①">client hints set</a> to an empty set.</p>
-   <p>There MAY be multiple <code>Accept-CH</code> headers per-response and this algorithm is run once for each in the order of the appearance of the header.</p>
+   <p>A site can clear the browser’s <code>Accept-CH</code> cache for its origin by sending an empty <code>Accept-CH</code> header in a response. This sets the origin’s <a data-link-type="dfn" href="#client-hints-set" id="ref-for-client-hints-set①">client hints set</a> to an empty set.</p>
+   <p>There MAY be multiple <code>Accept-CH</code> headers per-response and <a data-link-type="dfn" href="https://www.rfc-editor.org/rfc/rfc8941.html#name-lists" id="ref-for-name-lists">sf-lists</a> can be split across lines as long as each line contains at least one token.</p>
    <p class="note" role="note"><span class="marker">Note:</span> As the cache can only be modified by the top-level frame, it is considered to be partitioned.</p>
    <p>When asked to <dfn class="dfn-paneled" data-dfn-type="dfn" data-noexport id="update-the-client-hints-set-from-cache">update the client hints set from cache</dfn> given a <var>settingsObject</var>:</p>
    <ol>
@@ -692,7 +692,7 @@ <h3 class="heading settled" data-level="3.3" id="critical-ch-algo"><span class="
 needed as they were sent. If hints listed in the <code>Critical-CH</code> header are not
 in the <code>Accept-CH</code> header a reload would not result in the hints being included
 anyway.</p>
-   <p>There MAY be multiple <code>Critical-CH</code> headers per-response and this algorithm is run once for each in the order of the appearance of the header.</p>
+   <p>There MAY be multiple <code>Critical-CH</code> headers per-response and <a data-link-type="dfn" href="https://www.rfc-editor.org/rfc/rfc8941.html#name-lists" id="ref-for-name-lists①">sf-lists</a> can be split across lines as long as each line contains at least one token.</p>
    <p>When asked if the user agent <dfn class="dfn-paneled" data-dfn-type="abstract-op" data-export id="abstract-opdef-should-reload-page-for-critical-client-hints">should reload page for critical client hints</dfn> given a <var>settingsObject</var> and <var>response</var>:</p>
    <ol>
     <li>If <var>settingsObject</var> is a <a data-link-type="dfn" href="https://html.spec.whatwg.org/multipage/webappapis.html#non-secure-context" id="ref-for-non-secure-context①">non-secure context</a>, abort these steps. 
@@ -1354,6 +1354,13 @@ <h3 class="no-num no-ref heading settled" id="index-defined-here"><span class="c
     <li><a href="#ref-for-serviceworkerglobalscope">4.3. Service Worker initialization</a>
    </ul>
   </aside>
+  <aside aria-labelledby="infopaneltitle-for-c5d53c47f4b9ab918d7fab93e2e21fe0" class="dfn-panel" data-for="c5d53c47f4b9ab918d7fab93e2e21fe0" id="infopanel-for-c5d53c47f4b9ab918d7fab93e2e21fe0">
+   <span id="infopaneltitle-for-c5d53c47f4b9ab918d7fab93e2e21fe0" style="display:none">Info about the 'sf-lists' external reference.</span><a href="https://www.rfc-editor.org/rfc/rfc8941.html#name-lists">https://www.rfc-editor.org/rfc/rfc8941.html#name-lists</a><b>Referenced in:</b>
+   <ul>
+    <li><a href="#ref-for-name-lists">3.2. Accept-CH cache</a>
+    <li><a href="#ref-for-name-lists①">3.3. Critical-CH</a>
+   </ul>
+  </aside>
   <aside aria-labelledby="infopaneltitle-for-eb0e1698348a5ae30cd3aa882b6dff01" class="dfn-panel" data-for="eb0e1698348a5ae30cd3aa882b6dff01" id="infopanel-for-eb0e1698348a5ae30cd3aa882b6dff01">
    <span id="infopaneltitle-for-eb0e1698348a5ae30cd3aa882b6dff01" style="display:none">Info about the 'origin' external reference.</span><a href="https://url.spec.whatwg.org/#concept-url-origin">https://url.spec.whatwg.org/#concept-url-origin</a><b>Referenced in:</b>
    <ul>
@@ -1432,6 +1439,11 @@ <h3 class="no-num no-ref heading settled" id="index-defined-elsewhere"><span cla
     <ul>
      <li><span class="dfn-paneled" id="5ff45f8d2f143fcd4995056a19575007">ServiceWorkerGlobalScope</span>
     </ul>
+   <li>
+    <a data-link-type="biblio">[STRUCTURED-FIELDS]</a> defines the following terms:
+    <ul>
+     <li><span class="dfn-paneled" id="c5d53c47f4b9ab918d7fab93e2e21fe0">sf-lists</span>
+    </ul>
    <li>
     <a data-link-type="biblio">[URL]</a> defines the following terms:
     <ul>