[atlas] Questions about paris traceroute

> While technically it would be possible to add some feature to the
> system to do multiple paris variations at (or close to) the same time,
> this would add a lot of complications to the code base and to result
> parsing (which is already not simple). Instead, it is already possible
> to schedule multiple measurements to run at roughly the same time,
> which provides an approximation to what you describe here.

how close an approximation?  chasing ecmp and lag is bad enough without
other changes.  folk need reproducible results.

randy