LOR in NFS server

[Jeffrey Hsu]

  > 1st 0xc9384c44 inp (inp) @ /local/usr.src/sys/netinet/tcp_input.c:649
  > 2nd 0xc05aa84c tcp (tcp) @ /local/usr.src/sys/netinet/tcp_usrreq.c:621

This old nag warning has been there since last year and was first reported
by Lars Eggert <larse at ISI.EDU>.  I made up a fix for him at the time which
you can find at http://www.freebsd.org/~hsu/hammer.diff.  Lars has verified
that this eliminates the nag warnings.

But, I'm hoping to have a more unified solution to the general sowakeup
problem, so have not committed this patch.

							Jeffrey