The URL wasn't loading when the database is used (interwiki cache works). "PHP Notice: Trying to get property of non-object in /www/w/includes/api/ApiQuerySiteinfo.php on line 295"
This reverts
r97806. It took me some time to find out, but
r96475 accidentally backported the change from $row->iw_url to $row['iw_url'] (etc) to 1.18, which was fixed in
r97789. That revision was merged to trunk, which shouldn't have been done either. I.e. until 1.18 it is an object, from 1.19 it is an array.