Create URLs with typolink for pages with sites
The PageLinkBuilder now separates out into generating links for pages with site configuration, and without site configuration (= as before).
The new link mechanism does not rely on previous hooks and options like config.absRefPrefix which are not necessary for URLs as they are always absolute.
A new TypoScript option "typolink.language" is introduced. If not set, it is set to "current", and allows to link across pagetrees to a given site, or render a language menu without having to use "&L=" as additional query parameter ("current" is the current language and default) is used to also allow to explicitly link to a different language if this language was configured for the site configuration for the site.