Autodiscover name doesn't work with uppercase path

[e-minguez]

file-to-machineconfig --file 30-mtu --remote /etc/NetworkManager/dispatcher.d/30-mtu
{
  "kind": "MachineConfig",
  "apiVersion": "machineconfiguration.openshift.io/v1",
  "metadata": {
    "name": "99-worker-etc-NetworkManager-dispatcher-d-30-mtu",
    "creationTimestamp": null,
    "labels": {
      "machineconfiguration.openshift.io/role": "worker"
    }

Then

$ oc create -f mc-mtu.json 
The MachineConfig "99-worker-etc-NetworkManager-dispatcher-d-30-mtu" is invalid: metadata.name: Invalid value: "99-worker-etc-NetworkManager-dispatcher-d-30-mtu": a DNS-1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')

[e-minguez]

I've just tested this and it seems to work. I've added the change here 35bbdc3