Allow admin to choose 301 redirect instead of 302 to prevent 302 penalty

hello,
it would be better to add a 301 header responce to prevent following:

http://en.wikipedia.org/wiki/302_Google_Jacking

Add "header( "HTTP/1.1 301 Moved Permanently" );"
near line 142:

....
if (isset($url)) {
    watchdog('ad', t('Clicked %type ad aid %aid hostid %hostid.', array('%type' => $adtype, '%aid' => $aid, '%hostid' => $hostid)));
    
    header( "HTTP/1.1 301 Moved Permanently" ); 
    header('Location: '. $url);
  }
....

thnx
wolfram