Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Remove redundant (in FreeBSD) include.

Update SES userland examples to something out of the toy stage.
Approved: jkh

Add a minimal example set of how to use the SES ioctls to monitor
SES/SAF-TE devices. It's usable enough (in chpmon) to be alerted as you'd
like to be if a powersupply goes south.