I set an empty list for $wgOpenIDProviders, set $wgOpenIDConsumerDenyByDefault = true and left $wgOpenIDConsumerAllow empty, set $wgOpenIDAllowExistingAccountSelection false, and set $wgOpenIDHideOpenIDLoginLink true. But it still allows Special:OpenIDLogin to pretend to work, and it still shows the "Your OpenIDs for login" section on Special:Preferences.
Version: master
Severity: normal