kern/65219: update sysctl descriptions for SYSV IPC variables

[Christian S.J. Peron]

Synopsis: update sysctl descriptions for SYSV IPC variables

Responsible-Changed-From-To: freebsd-bugs->	 csjp 
Responsible-Changed-By: csjp
Responsible-Changed-When: Thu May 6 08:34:30 PDT 2004
Responsible-Changed-Why: 

I will take this one. I spoke with Dan regarding these changes
earlier and I think it would be beneficial to add these descriptions.
Especially for people who are tuning apps which have a heavy 
reliance on IPC.


http://www.freebsd.org/cgi/query-pr.cgi?pr=65219