Changes:
* Rename $wgRelatedArticlesShowReadMore to $wgRelatedArticlesShowInFooter
* Add $wgRelatedArticlesShowInSidebar, which is truthy by default, and
short circuit the SkinBuildSidebar and SkinTemplateToolboxEnd hook
handlers if it is falsy
Bug: T119926
Change-Id: Idf04bf3221ba44d7b898160764fbd6ba83561abb
There are two positions where the list of related articles is rendered:
the sidebar, and the the footer. Move the hook handlers related to
rendering the former to RelatedArticles\SidebarHooks and those related
to rendering the latter to RelatedArticles\FooterHooks.
Change-Id: Idde57905d828e63309bfdc360a3a09e64e291304