That's what it should look like.
Looking at the code it seems it should only be there if it's time for the next cron job to run (which I'm sure is why you don't see it on other sites), but I noticed on my test site that it always seems to be there. I have no idea why.
ETA: ...or I should say yes, it should have the full path to cron.php. I don't know if
http://forumlink.tld/ is right for your site. It uses the value of $vbulletin->options['bburl'] which is set in the options.