When station 'show' is invoked, parse and print any IP addresses
associated with the interface.
If iwd network configuration is disabled and no IP addresses were
configured, print a hint to the user that a DHCP client might need to be
configured.
WEP networks are not supported by iwd. However, the only indication is the
message "Operation not supported" while trying to connect. It is not clear
enough that this is due to intentional lack of support (as opposed to some
kind of misconfiguration). This patch explicitly lists WEP networks shown
with get-networks as unsupported. Hopefully this will make it clearer for
those of us not as familiar with iwd.
The diagnostic interface will now only come up when station is
connected. This avoids the need for display station to return
a 'connected' out parameter. We can instead just see that
the diagnostic interface doesn't exist.
The information requested with GetDiagnostics will now appear in
the "station <iface> show" command. If IWD is not connected, or
there is no diagnostic interface (older IWD version) 'show' will
behave as it always has, only showing scanning/connected.
Station, WSC, Ad-Hoc and AP family_arg_completion functions were
identical except for which commands they were referencing and the
interface type they were interested in. Combine all these into a single
function.
