Windows service can't stop without an error.

[Techni-P]

With windows_exporter 0.24.0 we have again the same Issue like:
#1258

When I try to stop the windows_exporter service (v0.24.0), it always returns an error:

and the Process is still running in the Background.

[DiniFarb]

I have looked into that again and I was able to reproduce it with v0.24.0. But the stop error was not thrown every time just here and there. So I was thinking again of what I mentioned in #1258. Maybe sometimes the main thread/goroutine finishes before the subroutine which does the communication to the windows API has completed. To proof my point I have added a delay after the stop signal is sent to the main thread in the Execute func here: https://github.com/DiniFarb/windows_exporter/blob/aebd6df1e21760d887dd26041a402f14c5d79c33/pkg/initiate/initiate.go#L23-L46

with this delay of 100ms the stop error is thrown each time the service is stopped.

I think the problem lies in that the svc.Run func is not the one which blocks the main routine as it is in the example of go here: https://github.com/golang/sys/blob/master/windows/svc/example/main.go

I am running out of time right now but I can dig into this further in a few days .. well next year ^^

[jkroepke]

@DiniFarb this issue can be close, right?