Support network-config for the nocloud-net datasource

This bug was originally filed in Launchpad as [LP: #1809180](https://bugs.launchpad.net/cloud-init/+bug/1809180)

Launchpad details

affected_projects = []

assignee = None

assignee_name = None

date_closed = None

date_created = 2018-12-19T23:12:41.495696+00:00

date_fix_committed = None

date_fix_released = None

id = 1809180

importance = medium

is_complete = False

lp_url = https://bugs.launchpad.net/cloud-init/+bug/1809180

milestone = None

owner = simonklb

owner_name = Simon Kollberg

private = False

status = triaged

submitter = simonklb

submitter_name = Simon Kollberg

tags = []

duplicates = []

_Launchpad user **Simon Kollberg(simonklb)** wrote on 2018-12-19T23:12:41.495696+00:00_

Currently the nocloud-net datasource does not read the network-config from the provide URL. It would be nice if this was supported so that the network can be configured after the fallback network has been established. This way you can boot the image in a different environment without having to run cloud-init a second time.

Example network-config:

version: 2
ethernets:
all-en:
match:
name: "en*"
dhcp4: true