Dmitry Tantsur f65b52ed8d Remove questionable defaults from the network configuration
We definitely should not default to using Google DNS or assuming a
specific MTU. The default gateway won't work for many deployments.

Remove them, refactor network_metadata and add some unit tests.

Change-Id: Icb5d077a5f68b5affc1ed545e04c96dcc01d9f3e
2022-02-18 12:43:03 +01:00
..