Added a system setting for allowing OpenID logins and registrations

* Defaults to off
* Is set in the Administration panel under Authentication

  #699

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@2449 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/account_controller.rb

@@ -46,10 +46,10 @@ class AccountController < ApplicationController
       self.logged_user = nil
     else
       # Authenticate user
-      unless using_open_id?
-        password_authentication
-      else
+      if using_open_id? && Setting.openid?
         open_id_authenticate(params[:openid_url])
+      else
+        password_authentication
       end
     end
   end