* @return array an assoziative array with:
* * \e int \b return_code => HTTP return code or 0 if timeout or failure
* * \e boolean \b success => boolean true (if HTTP 2xx result) or false
* @return array an assoziative array with:
* * \e int \b return_code => HTTP return code or 0 if timeout or failure
* * \e boolean \b success => boolean true (if HTTP 2xx result) or false