This way one will be able to reliably detect when the example playbook was
forgotten to be upated with correct addresses, as the RFC 5737 addresses are
never used in production (the original RFC 1918 ones often are).
https://github.com/linux-system-roles/network/issues/5
The role already supported a default variable ("network_provider") and
host variables ("network_provider_default", "network_service_name",
"network_packages").
Don't use nested variables under "network" like
network:
provider:
ignore_error:
connections:
instead promote them all to top-level variables like:
network_provider:
network_ignore_error:
network_connections:
This seems more consistent (as we already have multiple top-level
variables), it seems to follow ansible style, and it makes it easier
to overload individual variables via conditional include files.
