// exit code of NOTHING_TO_DO (0). Otherwise, it will have an exit code
// that is something other than NOTHING_TO_DO, SERVER_ALREADY_STARTED,
// START_AS_DETACH, START_AS_NON_DETACH, START_AS_WINDOWS_SERVICE,
// START_AS_DETACH_QUIET, START_AS_NON_DETACH_QUIET to indicate that a
// problem occurred.
if (argParser.usageOrVersionDisplayed())
{
// We're just trying to display usage, and that's already been done so
// exit with a code of zero.
System.exit(NOTHING_TO_DO);
}