Fix a typo that gave an invalid unit.


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45568 c2e8774f-c49f-e111-b436-862b2bbc8956
The FreeBSD Foundation website always redirects to https, so link direct
to the secure version in the website footer.


git-svn-id: svn+ssh://svn.freebsd.org/doc/head@45569 c2e8774f-c49f-e111-b436-862b2bbc8956