Changelog

• Fix shutdown mode on TrueNAS SCALE
• Add support for using smartctl to interact with drives
• Allow selection of disk control tool (camcontrol, hdparm, smartctl) via CLI argument -x
• Improve host system detection to distinguish between TrueNAS CORE and TrueNAS SCALE
• Simplify active drive detection
• Skip drive I/O detection loop if all monitored drives are already sleeping