Manual:$wgExtensionAliasesFiles

Details
Aliases for special pages provided by extensions. Deprecated.

Instead of using $wgExtensionAliasesFiles, use $wgExtensionMessagesFiles instead. For an example, see the documentation about setting up a SpecialPage extension.

pre1.16 installations
"Member $wgExtensionAliasesFiles - since 1.16 Use $specialPageAliases in a file referred to by $wgExtensionMessagesFiles" http://svn.wikimedia.org/doc/DefaultSettings_8php.html#aff2412416793a9bd3d88f881309b790f

Associative array mapping special page to array of aliases. First alternative for each special page will be used as the normalised name for it. English aliases will be added to the end of the list so that they always work. The file must define a variable $aliases.

Example: