call_control: add a note that the callcontrol application expect the MI interface

src/modules/call_control/doc/call_control_admin.xml

@@ -43,6 +43,15 @@
             is available from http://callcontrol.ag-projects.com/
           </para>
         </listitem>
+        <listitem>
+          <para>
+            At the moment the callcontrol application only supports the old
+            <quote>MI</quote> interface for communication with Kamailio. This
+            interface is unfortunately not available anymore in Kamailio. So
+            this application can't be used right now together with the
+            call_control module.
+          </para>
+        </listitem>
         <listitem>
           <para>
             A rating engine that is used to calculate the time limit based on