sum_clientid
snprintf(buf, buflen, "%s", sum_clientid(args->clientid));
snprintf(buf, buflen, "%s", sum_clientid(args->clientid));
snprintf(buf, buflen, "%s CFV=%s", sum_clientid(args->clientid),
sum_clientid(res->SETCLIENTID4res_u.resok4.clientid),
static char *sum_clientid(clientid4 client);