[Cake] progress? dual-src/dsthost unfairness

[gamanakis at gmail.com]

> On the contrary, even if a particular flow is sparse, the relevant quantum
> calculation should involve the number of *bulk* flows attached to the same
> host.  Though there is possibly an argument for making it the *sum* of the
> sparse and bulk flows, making it just the sparse ones is wrong.

I was about to point out that my assumption is obviously wrong.
cake_enqueue() can still assign a packet to a bulk flow. 
Will try with the sum of the flows and report.