add stop in SCM as well

Author: codemodify

Service/system-service_windows.go

@@ -402,6 +402,9 @@ loop:
 				changes <- c.CurrentStatus
 
 			case svc.Stop, svc.Shutdown:
+				if thisRef.command.OnStopDelegate != nil {
+					go thisRef.command.OnStopDelegate()
+				}
 
 				// golang.org/x/sys/windows/svc.TestExample is verifying this output.
 				testOutput := strings.Join(args, "-")