backlinks

[Klap-in]

Not sure if this is a good thing to have backlinks for each listing.

Topic syntax had backlinks for pages that were listed:

from syntax/topic.php

 // for metadata renderer
/*        } elseif ($format == 'metadata') {
            foreach ($pages as $page) {
                $renderer->meta['relation']['references'][$page['id']] = true;
            }

            return true;*/ // causes issues with backlinks

This only added pages. But if tags are removed from the linked pages, these backlinks are not updated.
d0e6331