Cannot Start or Stop Units anymore, when nothing reads from the job completion channel

[j-licht]

go-systemd/dbus/methods.go

Line 48 in d843340

out <- result

The jobHandler used e.g. by Conn.StartUnitContext blocks for ever if nothing reads from the provided channel.
I think this write to the result channel should be non-blocking, like this:

	c.jobListener.Lock()
	out, ok := c.jobListener.jobs[job]
	if ok {
		select {
		case out <- result:
		default:
			fmt.Println("failed to write result to job channel")
		}
		delete(c.jobListener.jobs, job)
	}
	c.jobListener.Unlock()

I'm not sure, what is the best way to log something or if it's even necessary,