Hello Guix,

This preliminary patch set adds wicd and wicd-service.

The first patch adds dbus support to wpa-supplicant, while preserving
the lightweight wpa-supplicant without dbus under a different name:
wpa-supplicant-light.

The second patch adds the wicd package, although there are still some
issues with it (see below).

The third patch adds wicd-service.

It mostly works, and I'm using it right now, but there are still some
remaining issues:

* Unless run as root, the user interfaces to configure wicd via dbus
  always fail.  The wicd dbus configuration file is supposed to allow
  anyone in the 'netdev' group to access and configure the daemon, but
  this doesn't work.  I could use some help debugging this.

* The curses client always fails with the error "AttributeError:
  'Screen' object has no attribute 'get_input_nonblocking'", which I
  guess indicates some problem or incompatibility with our python2-urwid
  package.

I was pleased to discover that our xfce already includes a panel applet
to configure wicd, but it fails due to the same permissions problem that
affects all the other wicd clients.

Anyway, if you want to try this out, here's what you need to change in
your OS configuration:

* (use-modules (gnu packages wicd)
               (gnu services networking))
* Add wicd to the list passed to 'dbus-service'.
* Add (wicd-service) to 'services'.
* Add wicd to 'packages' (optional but recommended).

Special thanks to Pierre-Antoine Rault <par@rigelk.eu> for packaging
python-dbus and for the initial attempt at the 'wicd' package.

Comments, suggestions, and (most importantly) debugging welcome!

      Mark