Added Support for Ubuntu 15.04 in OS detect code.

Till Brehm

2015-05-06 68af0bbdd603e8b8bb9eae2cbd55264ce0647ddb

 interface/web/mailuser/lib/lang/de.lng

@@ -6,4 +6,4 @@
$wb['Send copy'] = 'Kopie senden an';
$wb['Spamfilter'] = 'Spamfilter';
$wb['Email Filters'] = 'E-Mailfilter';
?>
?>