1. Proposed title of this feature request
--> Allow specifying multiple MachineNetworks in install-config.yaml" instead of agent-config.yaml

2. What is the nature and description of the request?
--> Either allow specifying multiple MachineNetworks or disable the validation would be a suitable solution.

3. Why it is needed? (List the business requirements here)
--> If OpenShift nodes reside in more than one network, the Agent-Based Installer does not work because it requires the specification of a single MachineNetwork in the install-config.yaml.
Despite this, such a cluster configuration is well known and fully supported by Red Hat.

4. List any affected packages or components.
--> Agent Based Installer, OpenShift