[Codel] code review: openbsd codel implementation

[Dave Taht]

I've been beginning to worry that multiple implementations have been
getting the drop scheduler incorrect for codel.

The openbsd implementation caps the count at 400:

https://github.com/openbsd/src/blob/2207c4325726fdc5c4bcd0011af0fdf7d3dab137/sys/net/fq_codel.c#L263

-- 
Fixing Starlink's Latencies: https://www.youtube.com/watch?v=c9gLo6Xrwgw

Dave Täht CEO, TekLibre, LLC