"dataready" accept filter?

"Jeremy C. Reed" <[email protected]> Mon, 3 Sep 2007 13:36:51 -0500 (CDT)
Newsgroups gmane.os.netbsd.help
Message-ID <[email protected]>
Where can I read about "dataready" accept filter?

I did a google search and found FreeBSD references. I want to read about 
it for NetBSD.

How is it used? Any man pages?

I am curious because I read that Apache httpd and BIND named are affected 
by this. I wanted to know if this is specific to certain operating 
systems.

  Jeremy C. Reed