XEP-0443: added section about a/v calls

xep-0443.xml

@@ -114,7 +114,7 @@
     <section2 topic='Changes since 2020' anchor='changes-2020'>
       <p>The following changes were made to the Compliance Suites since &xep0423;:</p>
       <ul>
-	<li>TODO</li>
+        <li>Introduced new category for <strong>A/V Calling</strong>.</li>
       </ul>
     </section2>
     <section2 topic='Changes since 2019' anchor='changes'>
@@ -457,6 +457,62 @@
 	<li>&xep0286;</li>
       </ul>
     </section2>
+    <section2 topic='A/V Calling Compliance Suite' anchor='av'>
+      <p>
+        To be considered XMPP A/V calling compliant, all features from the core
+        compliance category must be met, as well as all features in this suite.
+      </p>
+      <table caption='A/V Calling Compliance Levels'>
+        <tr>
+          <th>Feature</th>
+          <th>Core Server</th>
+          <th>Core Client</th>
+          <th>Advanced Server</th>
+          <th>Advanced Client</th>
+          <th>Providers</th>
+        </tr>
+        <tr>
+          <td><strong>Call Setup</strong></td>
+          <td align='center'>N/A</td>
+          <td align='center'>&yes;</td>
+          <td align='center'>N/A</td>
+          <td align='center'>&yes;</td>
+          <td>&xep0167;, &xep0353;</td>
+        </tr>
+        <tr>
+          <td><strong>Transport</strong></td>
+          <td align='center'>N/A</td>
+          <td align='center'>&yes;</td>
+          <td align='center'>N/A</td>
+          <td align='center'>&yes;</td>
+          <td>&xep0176;</td>
+        </tr>
+        <tr>
+          <td><strong>Encryption</strong></td>
+          <td align='center'>N/A</td>
+          <td align='center'>&yes;</td>
+          <td align='center'>N/A</td>
+          <td align='center'>&yes;</td>
+          <td>&xep0320;</td>
+        </tr>
+        <tr>
+          <td><strong>STUN/TURN server discovery</strong></td>
+          <td align='center'>&yes;</td>
+          <td align='center'>&yes;</td>
+          <td align='center'>&yes;</td>
+          <td align='center'>&yes;</td>
+          <td>&xep0215;</td>
+        </tr>
+        <tr>
+          <td><strong>Quality and Performance improvements</strong></td>
+          <td align='center'>N/A</td>
+          <td align='center'>&no;</td>
+          <td align='center'>N/A</td>
+          <td align='center'>&yes;</td>
+          <td>&xep0293;, &xep0294;, &xep0338;, &xep0339;</td>
+        </tr>
+      </table>
+    </section2>
   </section1>
   <section1 topic='Future Development' anchor='future'>
     <p>This section outlines the protocol specifications that are relevant for