Trim stale entries.
Use consistent <para>&nbsp;</para> for empty sections.

Sponsored by:	The FreeBSD Foundation
Clean up leading/trailing whitespace.
Rewrap paragraphs and long lines.

Sponsored by:	The FreeBSD Foundation
Remove reference to FreeBSD 6.2-R in the freebsd-update(8) note.
Rewrap.

Sponsored by:	The FreeBSD Foundation
Move OpenSSH entry to 'contrib' where it belongs.

Sponsored by:	The FreeBSD Foundation