doc: Document missing D-Bus Interface properties

CurrentAuthMode and DisconnectReason have been added a long time ago,
but documentation update was forgotten.

Signed-off-by: Jouni Malinen <j@w1.fi>

doc/dbus.doxygen

@@ -610,6 +610,11 @@ fi.w1.wpa_supplicant1.CreateInterface.
 	<p>Path to D-Bus object representing configured network which %wpa_supplicant uses at the moment, or "/" if doesn't use any.</p>
       </li>
 
+      <li>
+	<h3>CurrentAuthMode - s - (read)</h3>
+	<p>Current authentication type.</p>
+      </li>
+
       <li>
 	<h3>Blobs - as - (read)</h3>
 	<p>List of blobs names added to the Interface.</p>
@@ -644,6 +649,11 @@ fi.w1.wpa_supplicant1.CreateInterface.
 	<h3>PKCS11ModulePath - s - (read)</h3>
 	<p>PKCS #11 module path.</p>
       </li>
+
+      <li>
+	<h3>DisconnectReason - i - (read)</h3>
+	<p>The most recent IEEE 802.11 reason code for disconnect. Negative value indicates locally generated disconnection.</p>
+      </li>
     </ul>
 
 \subsection dbus_interface_signals Signals