Feature: #87919 - Allow generation of absolute URLs completely

See forge#87919


A new TypoScript option config.forceAbsoluteUrls = 1 has been added.


If the option is set, all links, references to images or assets previously built with a relative or absolute path (e.g. /fileadmin/my-pdf.pdf) will be rendered as absolute URLs with the site prefix / current domain.

Examples for such use cases are the generation of a full static version of a TYPO3 site for sending a page via email.