Document substantive changes since Rec as candidate amendments

Candidate amendments process: https://www.w3.org/2021/Process-20211102/#candidate-changes
PR covered based on https://github.com/w3c/webrtc-pc/pulls?q=is%3Apr++-label%3AEditorial+merged%3A%3E2021-01-01+ (merged PRs since Jan 1 2021): #2679 #2680 #2686 #2687 #2689 #2691 #2700 #2704 #2708

webrtc.html

@@ -244,6 +244,7 @@ <h4>
               <h2>
                 Dictionary {{RTCConfiguration}} Members
               </h2>
+              <div id="change-pr2691" class="correction"><p><span class=title>Defining default values of the {{RTCConfiguration}} dictionary</span> is a candidate correction, aligning it with current implementations - see its <a href="https://github.com/w3c/webrtc-pc/pull/2691">associated pull request</a>.</p></div>
               <dl data-link-for="RTCConfiguration" data-dfn-for=
               "RTCConfiguration" class="dictionary-members">
                 <dt data-tests="RTCConfiguration-iceServers.html">
@@ -260,6 +261,7 @@ <h2>
                     the threshold. This implementation defined limit MUST be
                     at least 32.
                   </p>
+                  <div id="change-pr2679" class="correction"><p><span class=title>Allowing an implementation-defined limit to ICE servers</span> is a candidate correction - see its <a href="https://github.com/w3c/webrtc-pc/pull/2679">associated pull request</a>.</p></div>
                 </dd>
                 <dt data-tests="RTCConfiguration-iceTransportPolicy.html">
                   <dfn data-idl="">iceTransportPolicy</dfn> of type
@@ -742,6 +744,7 @@ <h2>
         <h3>
           State Definitions
         </h3>
+        <div id="change-pr2680" class="correction"><p><span class=title>{{RTCIceGatheringState}}, {{RTCPeerConnectionState}} and {{RTCIceConnectionState}} definitions have been updated to clarify the relevant transports the states represent</span>, as a candidate correction - see its <a href="https://github.com/w3c/webrtc-pc/pull/2680">associated pull request</a>.</p></div>
         <section>
           <h4>
             <dfn>RTCSignalingState</dfn> Enum
@@ -1025,6 +1028,7 @@ <h4>
                     or {{RTCIceTransportState/"checking"}} state or any
                     {{RTCDtlsTransport}} is in the {{RTCDtlsTransportState/"new"}}
                     or {{RTCDtlsTransportState/"connecting"}} state.
+                    <div id="change-pr2687" class="correction"><p><span class=title>Ensuring the {{RTCPeerConnectionState/"connecting"}} happens whenever a ICE or DTLS transport is new</span> is a candidate correction - see its <a href="https://github.com/w3c/webrtc-pc/pull/2687">associated pull request</a>.</p></div>
                   </td>
                 </tr>
                 <tr>
@@ -1788,6 +1792,7 @@ <h4>
                     </p>
                   </li>
                   <li>
+                    <div id="change-pr2708" class="correction"><p><span class=title>Restricting administratively prohibited candidates</span> is a candidate correction - see its <a href="https://github.com/w3c/webrtc-pc/pull/2708">associated pull request</a>.</p></div>
                     <p>If <var>remote</var> is <code>false</code> and this
                     triggers the ICE candidate gathering process in <span data-jsep=
                      "applying-a-local-desc">[[!RFC8829]]</span>, the [= ICE Agent =]
@@ -2930,6 +2935,7 @@ <h4>
             <h4>
               Set the configuration
             </h4>
+            <div id="change-pr2691-2" class="correction"><!-- automagically filled --></div>
             <p>
               To <dfn data-lt="set the configuration" id=
               "set-pc-configuration">set a configuration</dfn> with
@@ -3103,6 +3109,7 @@ <h4>
                 </ol>
               </li>
               <li data-tests="RTCConfiguration-iceTransportPolicy.html">
+                <div id="change-pr2689" class="correction"><p><span class=title>Validation of ICE settings during the setting of configuration</span> is a candidate correction - see its <a href="https://github.com/w3c/webrtc-pc/pull/2689">associated pull request</a>.</p></div>
                 <p id="config-icetransportpolicy">
                   Set the [= ICE Agent =]'s <dfn id=
                   "ice-transports-setting">ICE transports setting</dfn> to the
@@ -7185,6 +7192,7 @@ <h2>
           <h2>
             <dfn>RTCCertificateExpiration</dfn> Dictionary
           </h2>
+          <div id="change-pr2700" class="correction"><p><span class=title>Replacing <code>DOMTimeStamp</code> in the definition of the {{RTCCertificateExpiration.expires}} and of {{RTCCertificate.expires}}, and changing its origin to certificate creation time</span> is a candidate correction - see its associated pull requests <a href="https://github.com/w3c/webrtc-pc/pull/2686">PR#2686</a> and <a href="https://github.com/w3c/webrtc-pc/pull/2700">PR#2700</a>.</p></div>
           <p>
             {{RTCCertificateExpiration}} is used to set an expiration date on
             certificates generated by
@@ -12351,6 +12359,7 @@ <h3>
                     <dfn data-idl="">completed</dfn>
                   </td>
                   <td>
+                    <div id="change-pr2704" class="correction"><p><span class=title>Putting ICE Transport connection in {{RTCIceTransportState/"failed"}} state when no candidates are received</span> is a candidate correction - see <a href="https://github.com/w3c/webrtc-pc/pull/2704">its associated pull request</a>.</p></div>
                     The {{RTCIceTransport}} has finished gathering, received an
                     indication that there are no more remote candidates,
                     finished checking all candidate pairs and found a