_process_options

# File actionpack/lib/action_controller/metal/streaming.rb, line 207
    def _process_options(options) #:nodoc:
      super
      if options[:stream]
        if env["HTTP_VERSION"] == "HTTP/1.0"
          options.delete(:stream)
        else
          headers["Cache-Control"] ||= "no-cache"
          headers["Transfer-Encoding"] = "chunked"
          headers.delete("Content-Length")
        end
      end
    end