foris-controller: update to version 4.2.0
Added:
- wifi: 802.11ax HE modes (20, 40, 80 and 160); 80+80 is not supported yet
Changed:
- wifi: read and write OpenWrt 21.02 config syntax, while being able to read OpenWrt 19.07 config syntax
cc: @agumroian, @jhoracek