Starting and stopping nfsd apparently results in permanently disabling it

[Rick Macklem]

After a little look at nfsd.c, I think you need to SIGKILL the kernel daemon
to get rid of it. (That is what nfsd.c does.)

If you do a "ps ax" and find a "nfsd (server)" still there, "kill -9 <pid>" it
and then you can probably start the nfsd again.

rick