$wgNamespacePermissionLockdown[NS_FILE]['read'] = [ 'user' ];
$wgNamespacePermissionLockdown[NS_FILE_TALK]['edit'] = [ 'user' ];
$wgNamespacePermissionLockdown[NS_FILE]['read'] = [ 'user' ];
$wgNamespacePermissionLockdown[NS_FILE_TALK]['edit'] = [ 'user' ];