I'm using xml_curl for external dialplan fetch, but I like to
 split static and dynamic parts of configuration, so for example,
 leave call unloop logic, and voicemail extension in static xml file
 while having all other parts dynamic. It will allow to avoid
 unnecessary call to costly external source and also avoid xml parse
 of content that is static.

 Currently FS first look in xml_curl and only after that falls back
 to static files. Is that behavior possible to change, so FS will work
 like that:

 1 - Look in static xml file and execute all extensions that have
 'continue="true"'
 2 - If previous step didn't stop on matching extension than look in
 xml_curl or other source specified in dialplan param of sofia
 config.

 Looks like <param name="dialplan" value="XML:/path_to_dialplan_default.xml,XML"/>
 don't do the trick.