code: func RootFromConfig(c *Config) universal.Root {
  	return universal.Root{
  		Config: map[string]string{
  			"cert-file": c.CAFile,
  			"key-file":  c.CAKeyFile,
  		},
  		ForceRemote: c.Remote != "",
  	}
  }
docs: // RootFromConfig returns a universal signer Root structure that can
  // be used to produce a signer.