"Instances" are awkward

[Jort]

This is a feature request, rather than a bug; I started writing this as a blueprint, but got lost.

I have noticed that, in the cookbook, in pretty much ever case where the "instance" clause is used, a separate job, a task, is used to start the right instances. It would seem reasonable to me to add a new clause, to keep the instance together. a "no-instance-specified-start" and "no-instance-specified-stop" clause (to be renamed to something sensible). This means that these are kept together, making it easier to find. It also means that instance-based jobs can "start on/stop on".

I realise that things work 100% as they are now, and you have about a 119 more important things to do.