Thread:Project:Support desk/A lot of system pages don't have "nofollow, noindex" tags

Hello all, I have mediawiki v.1.22.13. After updating I see that there are a lot of system pages that usless and they don't have any nofollow, noindex tags like this: http://www.wikijournal.ru/index.php/MediaWiki:Aboutpage http://www.wikijournal.ru/index.php/MediaWiki:Categorytree-collapse-bullet — Wiki Journal http://www.wikijournal.ru/index.php/MediaWiki:Confirmemail_invalid How can I disable such pages from search engines? Shall use robots.txt for it?