OpenWrt 21.02.0 second release candidate

[rmilecki]

@anon50098793

big thanks to @rmilecki and all the developers for their hard work in this

Thanks I received a huge support from @jow

LuCI support for DSA is an important step. For those unfamiliar with DSA config I can recommend my mini tutorial:

Mini tutorial for DSA network config

Update from 2021-05-31: Option ifname was renamed to device This tutorial is valid for 21.02-rc2 (or newer) and recent snapshots Introduction DSA stands for Distributed Switch Architecture and is Linux kernel subsystem for network switches. It's an upstream replacement for OpenWrt's swconfig framework and many new routers use DSA drivers instead of swconfig drivers. In DSA each switch port is a separated Linux interface. It means ip / ifconfig command will show interfaces like lan1, lan2, w…