Fix for issue 4084 (Windows Service doesn't detect start-ds failure)
Improve the code of windows service to poll the status of the server (whether is running or not).
Improve some of the messages associated with the events that are sent to the windows service log.
Improve the code that is in charge of starting the service (and the server) to help identify cases where the server startup is correctly launched but the startup itself fails (because for instance a port of the server is already in use).