if(x($a->config[$family],$key))
unset($a->config[$family][$key]);
$ret = q("DELETE FROM `config` WHERE `cat` = '%s' AND `k` = '%s' LIMIT 1",
if(x($a->config[$family],$key))
unset($a->config[$family][$key]);
$ret = q("DELETE FROM `config` WHERE `cat` = '%s' AND `k` = '%s' LIMIT 1",