Abort Notification

[StefanKi]

In the abort notification branch, the abort notification is implemented.
But the abort notification only works, if the pi is powered some time after the car is shut down.
I power off the pi as soon as the car powers off, so this solution doesnt work in my case.
Are you going to implement the abort notification serverside? So that the abort notification is sent if no messages from the pi are sent to the server?
Would be an enhancement, but no must have, since you have another solution with pnp...