Don't use $wgTitle

Change-Id: I92195a67dfc7cee0a9498b351c79c98258ff2b11
Replace deprecated SpecialPage::getPage()

Change-Id: I7d2371afce1642feecfa6fa9a424a8cf8a9ae4da
Remove deprecated/removed $wgExtensionAliasesFiles

Change-Id: I0458ab35f11bfa260a9516ad70bbb979ec435a89