5.5.2.1 => still no replace_link_with_first_in_nav ?
PermalinkAlso, I saw in a different thread someone posted this solution to how to do it programmatically:
$child = $c->getFirstChild(); $cID = $child->getCollectionID(); header('Location:' . Page::getCollectionPathFromID($cID));
...but I'm not sure where that code would go.

http://www.concrete5.org/marketplace/addons/page-auto-redirect/...