[css-conditional-4] Add privacy, security, changes

Author: svgeesus

css-conditional-4/Overview.bs

@@ -69,4 +69,24 @@ when the text and layout processing engine ingesting
 this CSS text is capable of utilising the specified font-technology
 in layout and rendering.
 
+<h2 class=no-num id="priv">Privacy Considerations</h2>
+
+No Privacy issues have been raised against this document
+
+<h2 class=no-num id="sec">Security Considerations</h2>
+
+No Security issues have been raised against this document
+
 <h2 class=no-num id="acknowledgments">Acknowledgments</h2>
+
+<h2 id='changes' class='no-num'>
+  Changes</h2>
+
+  <h3 id="changes-from-20200303" class="no-num">Changes since the
+    <a href="https://www.w3.org/TR/2020/WD-css-conditional-4-20200303/">First Public Working Draft of 3 March 2020</a>
+  </h3>
+
+  <ul>
+    <li>Extended supports feature to express font capabilities</li>
+    <li>Added Privacy and Security sections</li>
+  </ul>