[Cake] overheads or rate calculation changed?

[Jonathan Morton]

> On 21 Dec, 2017, at 2:54 am, Andy Furniss <adf.lists at gmail.com> wrote:
> 
>    refactor cake_advance_shaper and ack_filter
> 
>    cake_advance_shaper now returns a modified len argument to
>    reflect cake_overhead.
>    skb_ack_filter variable replaced with ack

Fixed.  At one point cake_advance_shaper() was still getting a packet length with overhead correction already applied, and was then applying it a second time.

 - Jonathan Morton