OpenWrt 21.02 status

[Andy Botting]

> - IPv6 broken with flow offloading (according to reports, potentially
> related to hw flow offloading)

There is a bug report about this at:
  - https://bugs.openwrt.org/index.php?do=details&task_id=3373

I've reproduced it with and without hw flow offloading on mt7621.

I think it's very important to do something about this issue before
the release, as it took me nearly a week to track down. I found it
quite hard to isolate as it's like some packets just disappear, so
makes for a very bad user experience.