Comment 3 for bug 1271597

Eugene: I'm not saying that the behavior with fixed_ips = [] is strange, but that omitting fixed_ips and passing an empty list giving you different behavior is counter-intuitive.

Nowhere in the documentation I can find mention of that.

On top of that, we already had to fix bugs like bug #1224472 so that means for the same attribute None is not valid, empty list and omitting the attribute gives you different behavior. That is super confusing, at least to me.