NFtables and QoS in 2021

[dave14305]

Sounds similar to previous errors with variables:

Nftables custom QoS, round 2

so... some mods were needed to get it to "load" on 19.x.3, whether or not it works right i'm not able to test atm. had to use non-variables ( only ) here... changed the name of 'tag' here and/or had to use netdev for ingress to play ball