message: Add additional validation to branding flag
diff: @@ -144,6 +144,13 @@ func main() {
  if branding == "origin" {
  branding = "okd"
  }
  + switch branding {
  + case "okd":
  + case "ocp":
  + case "online":
  + default:
  + flagFatalf("branding", "value must be one of okd, ocp, or online")
  + }
  srv := &server.Server{
  PublicDir: *fPublicDir,
  