Add Discontinuted Drafts. Fixes https://github.com/w3c/respec/issues/…

…4152

documents-respec.html

@@ -104,6 +104,13 @@ <h2>Summary</h2>
       <td>N/A</td>
 	    <td>Yes</td>
 	  </tr>
+	  <tr>
+	    <th>Discontinued Draft</th>
+      <td>No</td>
+      <td>Varies</td>
+      <td>Varies</td>
+	    <td>No</td>
+	  </tr>
 	  <tr>
 	    <th>Working Draft</th>
       <td>Yes</td>
@@ -444,6 +451,15 @@ <h2>Proposed Recommendation</h2>
 
     <p>A Proposed Recommendation is a specification that has been accepted by W3C as of sufficient quality to become a Standard. Such specification has been reviewed by software developers, as well as by W3C Groups and other interested parties. It is published for a final review by W3C Members before approval by the W3C Director.
   </section>
+
+  <section id=DISC>
+    <h2>Discontinued Draft</h2>
+
+    <p>A Discontinued Draft is a specification that is no
+      longer intended to advance or to be maintained. It was never and will
+      not be a Recommendation.
+  </section>
+
 </section>
 <section id=standard>
 <h2>Standard</h2>