Add a note that Referrer-Policy header values should not be quoted

Fixes #97

index.html

@@ -1178,7 +1178,7 @@
 </style>
   <meta content="Bikeshed version 67155cabad72a8ab669a7d4421c90e2999a29b68" name="generator">
   <link href="http://www.w3.org/TR/referrer-policy/" rel="canonical">
-  <meta content="42f952a8cbe3b0d6d469ea29e3e576c9ff6f414b" name="document-revision">
+  <meta content="a900fb2f8c41513a9dd8f9fbd7e3c72abc861bb9" name="document-revision">
 <style>/* style-md-lists */
 
 /* This is a weird hack for me not yet following the commonmark spec
@@ -1774,6 +1774,8 @@ <h3 class="heading settled" data-level="4.1" id="referrer-policy-header"><span c
   browsers do not fail to parse the entire header field if it includes an
   unknown policy value. <a href="#unknown-policy-values">§11.1 Unknown Policy Values</a> describes in greater detail
   how new policy values can be deployed.</p>
+    <p class="note" role="note"><span>Note:</span> The quotes in the ABNF above are used to indicate literal strings.
+  Referrer-Policy header values should not be quoted.</p>
     <p><a href="#integration-with-fetch">§5 Integration with Fetch</a> and <a href="#integration-with-html">§6 Integration with HTML</a> describe
   how the <code>Referrer-Policy</code> header is processed.</p>
     <section class="informative">

index.src.html

@@ -548,6 +548,9 @@ <h3 id="referrer-policy-header">Delivery via Referrer-Policy header</h3>
   unknown policy value.  [[#unknown-policy-values]] describes in greater detail
   how new policy values can be deployed.
 
+  Note: The quotes in the ABNF above are used to indicate literal strings.
+  Referrer-Policy header values should not be quoted.
+
   [[#integration-with-fetch]] and [[#integration-with-html]] describe
   how the <code>Referrer-Policy</code> header is processed.