Backup and restore php scripts

src/freedombone-installer

webadmin/EN/backup.html

webadmin/EN/backup_complete.html

webadmin/EN/backup_confirm.html

webadmin/EN/format_confirm.html

webadmin/EN/restore_complete.html

webadmin/EN/restore_confirm.html

webadmin/backupconfirm.php

webadmin/restoreconfirm.php