Added lists for datalog and ispconfig log in the interface.

install/sql/ispconfig3.sql

interface/lib/config.inc.php

interface/web/admin/datalog_del.php

interface/web/admin/datalog_list.php

interface/web/admin/lib/lang/en_datalog_list.lng

interface/web/admin/lib/lang/en_syslog_list.lng

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

interface/web/admin/list/datalog.list.php

interface/web/admin/list/log.list.php

interface/web/admin/log_del.php

interface/web/admin/log_list.php

interface/web/admin/templates/datalog_list.htm

interface/web/admin/templates/syslog_list.htm