Change the default value for "Default Gravatar image" to "Identicons" (#32998).

Patch by Go MAEDA.


git-svn-id: http://svn.redmine.org/redmine/trunk@19520 e93f8b46-1217-0410-a6f0-8f06a7374b81

config/settings.yml

@@ -293,7 +293,7 @@ openid:
   default: 0
   security_notifications: 1
 gravatar_default:
-  default: ''
+  default: 'identicon'
 start_of_week:
   default: ''
 rest_api_enabled: