rprintf(F," --bwlimit=KBPS limit I/O bandwidth; KBytes per second\n");
rprintf(F," --write-batch=FILE write a batched update to FILE\n");
rprintf(F," --read-batch=FILE read a batched update from FILE\n");
+ rprintf(F," --protocol=NUM force an older protocol version to be used\n");
#ifdef INET6
rprintf(F," -4, --ipv4 prefer IPv4\n");
rprintf(F," -6, --ipv6 prefer IPv6\n");