[Cooker] Oxygen + Networking

[Dara Hazeghi]

I am overall pleased with Oxygen but I have 2 complaints:

1. After doing an upgrade at a high security level, All lines in my
resolv.conf have been commented out.

2. The default gateway has been set to none.

I think that security should not mean willfully modifying existing
settings. After all, if I wanted to wipe things clean, I could have done
an install, not an upgrade.

Dara