UA: German Wikipedia Broken Weblinks Bot; contact: gifti@tools.wmflabs.org
Protocol: HTTP/1.1
Robots.txt: No
Host: Wikimedia Foundation Inc.
NetRange: 208.80.152.0 - 208.80.155.255
CIDR: 208.80.152.0/22
Legit Wikimedia Foundation. Found this bot on an international, English language website with no links on Wikipedia as far as I know (referrer logs).
Interesting: Wikimedia Tool Labs is the web server for the Tool Labs project, the home of community-maintained external tools supporting Wikimedia projects and their users. Lot's of different bots there but not the 'German Wikipedia Broken Weblinks Bot'. However, user 'gifti' (Giftpflanze (toxic plant)) can be found on the maintainer list.
Unsure how to treat this bot.