RFC/PATCH capture qdisc requeue event in stats

[jamal <hadi@xxxxxxxxxx>]

The requeue event is useful in finding out when a device is overloaded
on the egress (bus or bandwidth).
Atached patch introduces this. I would have used the overlimit bits
but at the moment thats being used for different semantical reasons.
I have not done extensive testing on it. 

Opinions welcome - If all is good, Dave please apply.

cheers,
jamal

reqs-patch
Description: Text document