docs/99336: Unclear handbook wording about firewall_enable

[Mark Linimon]

Old Synopsis: Unclear handbook wording
New Synopsis: Unclear handbook wording about firewall_enable

Responsible-Changed-From-To: freebsd-www->freebsd-doc
Responsible-Changed-By: linimon
Responsible-Changed-When: Fri Jun 23 02:06:41 UTC 2006
Responsible-Changed-Why: 
This is actually a 'docs' PR; 'www' is for things that only appear on the
website. 

http://www.freebsd.org/cgi/query-pr.cgi?pr=99336