RJ45 broken for some interfaces under OpenSUSE 12.2

```
The CORE GUI checks for the existence of interfaces when you press start. In
exec.tcl it uses 'ifconfig -a -s'. Under OpenSUSE 12.2, ifconfig -s truncates
the device name. For example, vmnet1, vmnet2, vmnet3 on a host will all be
truncated to vmnet.

This line of code should use 'ifconfig -a' like proc rj45list does (when
invoking the RJ45 dialog.) Code there will correctly parse the list of
interfaces.
```

Original issue reported on code.google.com by `ahrenh...@gmail.com` on 5 Mar 2013 at 11:36