Enum seems to be mapped correctly. Make sure matching works on
real device though.
Also noticed that @available on iOS implies availability on
Catalyst as well, making it ineffective e.g. in this case, where
mobile and ethernet network matching should be only available on
iOS and macOS respectively.
- Group DNS "Enabled" and protocol into configuration
- Make DNS servers / search domains optional
- Make proxy bypass domains optional
Also refine a comment about future on-demand.