docs/89915: Reference to 'option' instead of 'options' for kern conf file

[Remko Lodder]

Synopsis: Reference to 'option' instead of 'options' for kern conf file

Responsible-Changed-From-To: freebsd-doc->remko
Responsible-Changed-By: remko
Responsible-Changed-When: Sun Dec 4 11:53:43 GMT 2005
Responsible-Changed-Why: 
Let me work on this since the submitter is right.

http://www.freebsd.org/cgi/query-pr.cgi?pr=89915