[Cake] man page bikeshed

[Dave Taht]

I would rather like the man page (one day) to include two realistic
examples - (say a week's uptime), taken while loaded,  one example
outbound, one example inbound, rather than the unloaded one it
currently has and the less than massively loaded one...

I loved looking over this result (at 40 users!) today.

https://forum.lede-project.org/t/sqm-cake-and-piece-of-cake-qos-high-cpu-usage/17794/2