adding the exception to the erorr output

 * #14 (comment)

  00:59:17,441 packages.buskill DEBUG DEBUG: BusKill soft-shutdown trigger executing now
  00:59:17,441 packages.buskill DEBUG DEBUG: Attempting to send 'soft-shutdown' command to root child
  00:59:17,443 packages.buskill ERROR ERROR: Failed to send 'soft-shutdown' command to root child

src/packages/buskill/__init__.py

@@ -1281,7 +1281,7 @@ def trigger_softshutdown_mac_shutdown(self):
 
  except Exception as e:
  # that didn't work; log it give up :(
- msg = "ERROR: Failed to send 'soft-shutdown' command to root child"
+ msg = "ERROR: Failed to send 'soft-shutdown' command to root child \n\t" +str(e)
  print( msg ); logger.error(msg)
 
  #####################