Add OnStartUSBOptions to santactl status

[mlw]

Normal output:

...
>>> Daemon Info
  Mode                      | Monitor
  Log Type                  | file
  File Logging              | Yes
  USB Blocking              | Yes
  USB Remounting Mode       | noexec, rdonly
  On Start USB Options      | ForceUnmount
...

JSON output:

...
  "daemon" : {
    "watchdog_ram_events" : 0,
    "block_usb" : true,
    "log_type" : "file",
    "mode" : "Monitor",
    "watchdog_cpu_events" : 0,
    "driver_connected" : true,
    "file_logging" : true,
    "remount_usb_mode" : [
      "noexec",
      "rdonly"
    ],
    "on_start_usb_options" : "Remount"
  },
...

[pmarkowsky]

LGTM.