Fixes the bug that wouldn't allow no_token be set to true

lib/puma/dsl.rb

@@ -105,7 +105,12 @@ def activate_control_app(url="auto", opts={})
       end
 
       if opts[:no_token]
-        auth_token = :none
+        # We need to use 'none' rather than :none because this value will be
+        # passed on to an instance of OptionParser, which doesn't support
+        # symbols as option values.
+        #
+        # See: https://github.com/puma/puma/issues/1193#issuecomment-305995488
+        auth_token = 'none'
       else
         auth_token = opts[:auth_token]
         auth_token ||= Configuration.random_token

lib/puma/runner.rb

@@ -55,7 +55,7 @@ def start_control
       app = Puma::App::Status.new @launcher
 
       if token = @options[:control_auth_token]
-        app.auth_token = token unless token.empty? or token == :none
+        app.auth_token = token unless token.empty? || token == 'none'
       end
 
       control = Puma::Server.new app, @launcher.events

test/config/control_no_token.rb

@@ -0,0 +1,5 @@
+activate_control_app 'unix:///tmp/pumactl.sock', { no_token: true }
+
+app do |env|
+  [200, {}, ["embedded app"]]
+end

test/test_pumactl.rb

@@ -29,6 +29,16 @@ def test_config_file
     assert_equal "t3-pid", control_cli.instance_variable_get("@pidfile")
   end
 
+  def test_control_no_token
+    opts = [
+      "--config-file", "test/config/control_no_token.rb",
+      "start"
+    ]
+
+    control_cli = Puma::ControlCLI.new opts, @ready, @ready
+    assert_equal 'none', control_cli.instance_variable_get("@control_auth_token")
+  end
+
   def test_control_url
     host = "127.0.0.1"
     port = find_open_port