The page has been removed because it took several seconds to load on the English Wikipedia. https://bugzilla.wikimedia.org/show_bug.cgi?id=41078 Niklas has already fixed the link, it needs to be backported to 1.21. https://bugzilla.wikimedia.org/show_bug.cgi?id=46719
On the "uselessness" of the special page: sure, on en.wiki it's 120k names, but e.g. on 178 Wikipedias it's a single very useful page of less than 50 names... http://wikistats.wmflabs.org/display.php?t=wp&s=ausers_asc
Nemo