I am starting a new thread and will close the old one, since the subject
changed. Not sure this is the right way.
This is a follow-up of https://issues.guix.gnu.org/60752

As Bruno Victal <mirai@makinata.eu> writes:

> Hi,
>
> Does connman absolutely require a wireless adapter backend?
> IMO if that's not the case, neither iwd nor wpa-supplicant backends should be pulled by connman. (or at least they should be required only if they are present among the services field)
> This is because not every machine comes or wants to use a wireless adapter.
>
>
> Cheers,
> Bruno

This patch allows users to disable wireless adapters or hook in a another
implementation like iwd, without breaking existing installations.