MachineRegistration error message is misleading

[mudler]

The message here is misleading:

os2/pkg/config/read.go

Line 181 in 085bc09

return nil, fmt.Errorf("rancheros.install.iso_url is required to be set in /proc/cmdline or MachineRegistration")

While registering with MachineRegistration, to provide an iso url the proper syntax in the spec file is:

spec:
  cloudConfig:
    rancheros:
      install:
        isoUrl: ""