>
> This enhancement is available for 5.5 in patch NSTFDD9A or a successor.
> One of its successors (I don't recall which one) went GR earlier this week.
>   It is also available 6.0 in a similar patch, but don't ask me which one.

  Here are GR patches which has this enhancement -

  For 5.5 it is NSTFDJ7
  For 6.0 it is NSTFDJ5

>
> Be forewarned, however, that if you use 'setsockopt' to alter the size of
> the TCP receive window, you may run into problems.  (Very few people
> explicitly set the size of the TCP receive window; only one that I know
> of.)  There is an even newer patch in very early testing should you run
> into that problem.

  Yes, we had a problem with setsockopt  failing that has been addressed
  in newer patches for 5.5 and 6.0.

--
 Regards,
 Ganesh HS, CSY Networking.