- Exit main() if pm_by_vuart_init() fails
- Use SIGHUP to gracefully power off a VM if pm_monitor_loop()
encounters a failure
- Identify a closed socket as a failure in pm_monitor_loop()
Tracked-On: #5736
Signed-off-by: Peter Fang <peter.fang@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>