initial t.38 support.

remake logical channel opening.
add missing param name in example config.

src/mod/endpoints/mod_h323/changes.txt

+initial t.38 support.
+remake logical channel opening.
+add missing param name in example config.
 add dtmfinband conf parameter.
 add endpoint-name conf parameter represents endpoint name.
 fix GK registration retrying in case of registration reject.

src/mod/endpoints/mod_h323/h323.conf.xml

@@ -14,6 +14,7 @@
     <param name="jitter-size" value="60"/>  <!-- optional -->
     <param name="progress-indication" value="8"/> <!-- optional - PI value in progress message-->
     <param name="alerting-indication" value="8"/> <!-- optional - PI value in alerting message-->
+    <param name="endpoint-name" value="fs"/>
   </settings>
   <listeners>
     <listener name="default">