The new function allows querying the presence of certain system features
such as dnsmasq or firewall availability or the compile time features
of hostapd and wpa_supplicant.
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
Implement new ubus rpcd backend calls for later use in the frontend:
- netdevs: dump information about Linux network devices present
- boardjson: dump /etc/board.json if present
- offload_support: query whether netfilter offloading is supported
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
