docs/74862: [patch] update tuning(7) man page

[Giorgos Keramidas]

Synopsis: [patch] update tuning(7) man page

State-Changed-From-To: open->patched
State-Changed-By: keramida
State-Changed-When: Thu Dec 9 15:53:49 GMT 2004
State-Changed-Why: 
I committed a slightly modified version of your last patch
(one that minimizes the lines affected by the change).

http://www.freebsd.org/cgi/query-pr.cgi?pr=74862