The code was really messy with lots of checks and inconsistencies.
This splits everything up into different functions and now everything is
relayed to a handler vtable.
An always enabled lexbor extension is added, containing the lexbor library that was separated from ext/dom extension in preparation of https://wiki.php.net/rfc/url_parsing_api. While at it, the lexbor library is upgraded to 2.5.0.
Co-authored-by: Niels Dossche <7771979+nielsdos@users.noreply.github.com>
Co-authored-by: Gina Peter Banyard <girgias@php.net>
