Updates mail module

config/exim4/exim4.conf.template

interface/lib/classes/getconf.inc.php

interface/lib/classes/ini_parser.inc.php

interface/lib/classes/listform.inc.php

interface/lib/classes/tform.inc.php

interface/lib/config.inc.php

interface/sql/ispconfig3db.sql

interface/web/mail/form/mail_alias.tform.php

interface/web/mail/form/mail_blacklist.tform.php

interface/web/mail/form/mail_box.tform.php

interface/web/mail/form/mail_domain.tform.php

interface/web/mail/form/mail_domain_alias.tform.php

interface/web/mail/form/mail_domain_catchall.tform.php

interface/web/mail/form/mail_domain_relay.tform.php

interface/web/mail/form/mail_forward.tform.php

interface/web/mail/form/mail_spamfilter.tform.php

interface/web/mail/form/mail_whitelist.tform.php

interface/web/mail/lib/admin.conf.php

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

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