Open both links and comments on Hacker News in two new tabs with a single click, inspired by RES' [l+c] feature
Adds a new button next to the comments link on Hacker News, marked [l+c]. This button will open both the link and the comments to that link, if the post has a link. If the post is an ad or a link that points straight to the comments, the element is ignored. Inspired by Reddit Enhancement Suite's [l+c] button, which does the same thing on that site.
