rfs4_findclient
cp = rfs4_findclient(&args->client, &create, NULL);
cp_unconfirmed = rfs4_findclient(&args->client, &create,
newcp = rfs4_findclient(&args->client, &create, cp_confirmed);
cp = rfs4_findclient(&cid, &create, conf);
extern rfs4_client_t *rfs4_findclient(nfs_client_id4 *,