Merge remote-tracking branch 'public/bug23081_025' into maint-0.2.9

  o Minor bugfixes (Windows service):

    - When running as a Windows service, set the ID of the main thread

      correctly. Failure to do so made us fail to send log messages

      to the controller in 0.2.1.16-rc, slowed down controller

      event delivery in 0.2.7.3-rc and later, and crash with an assertion

      failure in 0.3.1.1-alpha. Fixes bug 23081; bugfix on 0.2.1.6-alpha.

      Patch and diagnosis from "Vort".

   * event loop */

  service_status.dwCurrentState = SERVICE_RUNNING;

  service_fns.SetServiceStatus_fn(hStatus, &service_status);

  set_main_thread();

  do_main_loop();

  tor_cleanup();

}