retval = modperl_per_dir_callback(MP_RESPONSE_HANDLER, r);
retval = modperl_callback_per_dir(MP_RESPONSE_HANDLER, r);
int modperl_response_handler(request_rec *r){    int retval;    if (!strEQ(r->handler, "modperl")) {        return DECLINED;    }    modperl_response_init(r);    retval = modperl_per_dir_callback(MP_RESPONSE_HANDLER, r);    if ((retval == DECLINED) && r->content_type) {        r->handler = r->content_type; /* let http_core or whatever try */    }    modperl_response_finish(r);    return retval;}