OpenWrt 22.03.4 service release

Another RT3200 updated successfully. Thanks, devs!

An ongoing issue I've been having may have been fixed: dropbear came right up on the IPv6 listen address. On previous reboots, I've had to log in via IPv4 and restart dropbear to get it to come up on both address families. This is the first reboot I recall where v6 came up without intervention...