No default for these options can be determined in advance. That's why
I didn't default them to anything. The user *must* pick one.
> * winsup/cinstall/res.rc: Added accelerators and improved focus
> order. Removed WS_DISABLED from "OK" buttons to accomodate
> default focus changes in net.cc and source.cc.
>
> * winsup/cinstall/net.cc (dialog_proc): If no radio button
> is selected, a default is selected.
>
> * winsup/cinstall/source.cc (dialog_proc): Ditto.
>
> (check_if_enable_next): Removed. No longer needed since
> a radio button will always be selected.
>
> (load_dialog): Removed call to check_if_enable_next.
>
> (dialog_cmd): Ditto. Also added default to switch.
