Update CHANGES.html

CHANGES.html

@@ -66,7 +66,8 @@ us a note on ns-developers mailing list.</p>
 </ul>
 <h2>Changed behavior:</h2>
 <ul>
-<li></li>
+<li>Wi-Fi: EDCAFs (QosTxop objects) are no longer installed on non-QoS STAs and DCF (Txop object) is no longer installed on QoS STAs.</li>
+<li>Wi-Fi: Management frames (Probe Request/Response, Association Request/Response) are sent by QoS STAs according to the 802.11 specs.</li>
 </ul>
 
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