Added function "is_superadmin" in auth library and improved other functions.

Till Brehm

2014-08-13 19b5e01da02aa2115ee802cf2e43a7f3e58f4eac

 interface/web/mail/lib/lang/de_mail_mailinglist.lng

@@ -20,4 +20,3 @@
$wb['email_error_isemail'] = 'Die E-Mail Adresse ist falsch.';
$wb['mailinglist_txt'] = 'Mailingliste';
?>