Add cleanup for tracking-links of chip.de

[neufeind]

chip.de is a German IT-news-site. They have tracking links on their site, which contain the full URL for the target and thus could be parsed with a regex.

Example page:
https://www.chip.de/news/Vodafone-mit-weiterer-Aktion-Was-bedeutet-StayHome_182567730.html

Tracking link included there:
https://x.chip.de/linktrack/button/?url=https%3A%2F%2Fwww.vodafone.de%2Fnewsroom%2Fnetz%2Fstayhome-auf-jedem-handy-weil-wir-wollen-dass-ihr-sicher-seid%2F&c=8de2f3d865f23ac4473f53141fbbc468&type=text&articleId=126236983&referrer=https%3A%2F%2Fwww.chip.de%2Fnews%2FVodafone-mit-weiterer-Aktion-Was-bedeutet-StayHome_182567730.html&cms=ir&channel=News&bartId=1481&layoutId=4912&fqdn=www.chip.de

Cleaned target:
https://www.vodafone.de/newsroom/netz/stayhome-auf-jedem-handy-weil-wir-wollen-dass-ihr-sicher-seid/