bin/153012: iostat(8) requires an argument to -c option

[arundel at FreeBSD.org]

Synopsis: iostat(8) requires an argument to -c option

Responsible-Changed-From-To: freebsd-bugs->arundel
Responsible-Changed-By: arundel
Responsible-Changed-When: Sun Dec 26 21:16:51 UTC 2010
Responsible-Changed-Why: 
I'm working on fixing some iostat(8) manual page issues reported by Bruce Evans.

http://www.freebsd.org/cgi/query-pr.cgi?pr=153012