New code for backups with lots of new features

install/sql/incremental/upd_dev_collection.sql

install/sql/ispconfig3.sql

interface/lib/classes/aps_guicontroller.inc.php

interface/lib/classes/plugin_backuplist.inc.php

interface/lib/classes/remote.d/sites.inc.php

interface/lib/classes/sites_database_plugin.inc.php

interface/lib/classes/system.inc.php

interface/lib/plugins/sites_web_vhost_domain_plugin.inc.php

interface/web/sites/form/web_vhost_domain.tform.php

interface/web/sites/lib/lang/ar_web_backup_list.lng

interface/web/sites/lib/lang/ar_web_vhost_domain.lng

interface/web/sites/lib/lang/bg_web_backup_list.lng

interface/web/sites/lib/lang/bg_web_vhost_domain.lng

interface/web/sites/lib/lang/br_web_backup_list.lng

interface/web/sites/lib/lang/br_web_vhost_domain.lng

interface/web/sites/lib/lang/ca_web_backup_list.lng

interface/web/sites/lib/lang/ca_web_vhost_domain.lng

interface/web/sites/lib/lang/cz_web_backup_list.lng

interface/web/sites/lib/lang/cz_web_vhost_domain.lng

interface/web/sites/lib/lang/de_web_backup_list.lng