[RFC] How to handle backends properly?

[Maksim Orlovich]

> One of the point of those backends is to be able to make a release when a
> subsystem see its behavior changing (like in the transition from HAL 0.4
> to
> 0.5 for instance). Hosting them in kdebase or kdemultimedia doesn't really
> support this idea.

How far is HAL from 1.0? It seems that this need has more to do with its
immaturity/lack of API stability than anything else, so hopefully it will
stabilize some point soon, removing this headache...