Default to the correct main page

 * Ex. https://als.wikiquote.org/wiki/Houptsyte
       https://pl.wikipedia.org/wiki/Wikipedia:Strona_g%C5%82%C3%B3wna
       https://pt.wikipedia.org/wiki/Wikip%C3%A9dia:P%C3%A1gina_principal

Bug: T75909
Change-Id: Id524d1443197fed267a870ee5bdb7c7266085cbc
Merge "Default to the correct main page"