Don't parse URLs in issue/MR title
Right now, if I create an issue with a URL in the title, GitLab will autolink it when it's shown in the issues list. When trying to click through to view an issue, this means your cursor may land over the URL and you end up clicking through to the page on the other end of it instead. This is probably surprising even for legitimate issues, but when it's spam, it's something you really don't want.
The cursor isn't shown in this screenshot, but it's hovering over the URL in the title of issue 41.