fix yaml syntax and comment out (#14060)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11895 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/configuration.yml.example

@@ -200,7 +200,7 @@ default:
   # Configure OpenIdAuthentication.store
   #
   # allowed values: :memory, :file, :memcache
-  openid_authentication_store = :memory
+  #openid_authentication_store: :memory
 
 # specific configuration options for production environment
 # that overrides the default ones