I found that <ul id="footer-info"> is not included on special pages. This is the case in MediaWiki 1.27 and has been at least since 1.19. Just compare a special page to a page in the main namespace.
Strangely <ul class="footer-info"> is included when using the mobile view.
I consider this a bug, since footer-info is usually used to show information about licenses. Some special pages are accessible by visitors too. So they should see the license information on those pages too.
The issue is being discussed here too.