Bug in nfsd, or did I just read the manpage wrong ?

[Pete French]

I have a machine with three interfaces on it, two onto
internal networks, one ointo the outside world. I only want
NFS to be accessible on the two internal interfaces so I have this line
in my /etc/rc.conf:

nfs_server_flags="-u -t -n 4 -h 192.168.3.1 -h 192.168.4.1"

That works - but it ony enables TCP on the second interface, the
first is UDP only. I have tried all sorts of combinations and
positioning for the -t flag, but the end result is the same. UDP
on both, TCP only on 192.168.4.1.

Hmmmm... anybody got any ideas ? Puzzling the hell out of me!

-pcf.

PS: This is 4-STABLE, havent yet tried on 5-STABLE