Pipe and Queue

[vladone]

Look good. Most useful is to testing this rules, and depend of your
traffic, u can change settings.I think that is good to eliminate
delay options from pipe. For queue u can test different value. Man
page explain very well. If u have too large queue size, then delay can
grow for traffic.

Second question: The latest release on the 5-STABLE branch is
5.4-RELEASE. Release version is for testing new options.
This i think respond to your problem.

For more information u can read this:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/faq/introduction.html#LATEST-VERSION