rem: str_t * rls_get_uri(rl_subscription_t *s)
add: str_t * rls_get_package(rl_subscription_t *s)
context: str_t * rls_get_uri(rl_subscription_t *s){	if (!s) return NULL;		if (s->type == rls_external_subscription) {		return &((s)->external.record_id);	}	else {		if (s->internal.s) return &s->internal.s->record_id;	}	return NULL;}