Distinguish net config approaches

[devopsbob]

Draft variations to configure a given network

[learmj]

Hi Bob. Thanks for this. I appreciate you taking the time to write it up. In all likelihood I'm not going to get time to review it in detail this side of Christmas. From a very quick glance:

• I would drop the first person references everywhere.
• I'd be reticent to do anything that messes with what systemd might do (eg with resolv.conf).
• If the example is intended to show selecting between different network configurations, it may be helpful to have different layers selected for each configuration (eg via config file).

[devopsbob]

Hi Matthew, wanted to give a little back for your help. I did expect it needed cleanup. I'll look to make these suggested update before Christmas. That is my target to have my new box online! It is also likely a year-end crunch time for whatever you may be working on.

I'll leave this in draft. I'll update or close it by EOY. Any and all comments to this PR are welcome from any/all to help along the tidying.