Add description of "username" class to systemitem, sort classes
alphabetically.
Correct systemitem class to from ipaddr to ipaddress.
Fix the literal example for <systemitem class="ipaddress">.
Restore <replaceable> tags in the wireless network section that were
lost in the DocBook 5 conversion.
Try and complete the missing USES that exist.

Sponsored by:	Absolight
Add sample markup for stdin, stdout, and stderr.
releng/10.0 has been turned over to secteam.

Approved by:	re (implicit)
Sponsored by:	The FreeBSD Foundation
Add a small section on shell redirection and piping.
Fix two sentences to not start with a lower case command.

Reviewed by:	bcr, wblock
Replace kwm's key with a new one, signed with my key and verified in person.
Correctly generate a usable PGP key, using wblock's excellent guide.
kwm signed my key as well, so update it.
Remove ntpdate.
Re-clarify servers' response section.

Submitted by: bjk, imp
Sponsored by: iXsystems
Whitespace fix only. Translators can ignore.

Sponsored by: iXsystems
Update links with MFC glossary anchor.
- Update my PGP key
Rewrite the front of the security section.  This version
adds a small discussion on using sudo, shows and example
of using an IDS rather than just discussing what they are,
update of threats, discussion on rootkits and back doors,
adds more sysctls and more.
Edits to first section of Updating section.
Improve the introduction.
Update the config file entries.

Sponsored by: iXsystems
Add entities for qlxgbe(4) and qlxge(4).
Comment out traditional pkg_* section.
Subsequent commits will chase down remaining pkg_* commands in other sections.

Reviewed by: bapt
Sponsored by: iXsystems
Remove LATEST_LINK mentions, nobody should use it, ever.

Sponsored by:	Absolight