clntudp_create
clnt = clntudp_create(addr, prog, vers, to, fdp);
client = clntudp_create(addr, PMAPPROG, PMAPVERS, rmttimeout, &fd);
extern CLIENT *clntudp_create(struct sockaddr_in *, rpcprog_t, rpcvers_t,
extern CLIENT *clntudp_create();