travelmate: release 2.4.8-1

travelmate: release 2.4.8-1

* distinguish an active run cycle from an idle daemon in the
  runtime status: 'processing' is now only reported while f_main
  is actually running, an idle daemon without uplink reports
  'not connected' instead
* settle the status file at the end of f_main, so a leftover
  'processing' does not survive into the sleep phase
* README: document the travelmate_status values and the LuCI
  button behaviour

Signed-off-by: Dirk Brenken <redacted>