ims_qos: docs for recv_mode parameter

src/modules/ims_qos/doc/ims_qos_admin.xml

@@ -532,6 +532,27 @@ modparam("ims_qos", "rr_default_bandwidth", 2000)
         <programlisting format="linespecific">
 ...
 modparam("ims_qos", "suspend_transaction", 0)
+...
+        </programlisting>
+      </example>
+    </section>
+
+    <section>
+      <title><varname>recv_mode</varname> integer</title>
+
+	  <para>If set to 0, rx_aar_register() takes the received-from address values
+	  (IP, port, proto) from the IP frame. If set to 1, it takes them from
+      Via header. </para>
+
+      <para><emphasis> Default value is 0</emphasis></para>
+
+      <example>
+        <title><varname>recv_mode</varname> parameter
+        usage</title>
+
+        <programlisting format="linespecific">
+...
+modparam("ims_qos", "recv_mode", 1)
 ...
         </programlisting>
       </example>