Allow passing files to `os configure` via `--system-connection` to allow
pre-configuration of network connections, such as cellular/GSM.
Change-type: minor
Connects-to: #957
Connects-to: #1162
Connects-to: #1498
Signed-off-by: Rich Bayliss <rich@balena.io>
Also add more non-interactive configuration options:
--config-network, --config-wifi-*, --config-app-update-poll-interval
Change-type: minor
Signed-off-by: Paulo Castro <paulo@balena.io>