[Cake] wash option not in tc-adv

[Dave Taht]

yes, you typically do have to install (or re-install) tc-adv with the

opkg install --force-overwrite tc-adv

option. The ongoing goal of course is to get this stuff mainlined,
which we seem no closer to doing. I'd really hoped to get some good
performance numbers back this past weekend, and didn't. I do "feel"
that the revised codel model is not testing out as good as the one in
fq_codel, that on a variety of tests set associative hashing is not
seemingly worth it...

and boy, oh boy, does peeling have issues on the hardware I tried it on.