Add the new sesutil(8) utility for managing SCSI Enclosure Services (SES) device.

Fix iteration bug

Please the angry gcc 4.2 gods

Improve and expand sesutil(8)

Return an error if no matching device is found
Locate can address a slot, in addition to a drive
Added fault, similar to locate but blinks a different LED
Added the map command, lists all devices connected to the SES controller
Added the status command, overall status of the SES controller

sesutil: fix map not printing the status of the LED device in an array

sesutil: pass the correct element type when printing the SES map

sesutil: Add extra information specific to some SES devices to sesutil map

Fix sesutil locate when a sesid is passed to locate command

Show the enclosure name and id in sesutil map