add translations to list-files



See merge request !357

First part of fix for issue #3896 - Unknown column 'default_mailserver' in 'field list' when saving client limits main template

Fix db stats - Please review

I think I found the fix... Please review if that's correct tough.
I just added  sys_group.groupid = web_database.sys_groupid AND

closes ispconfig/ispconfig3#3963
closes ispconfig/ispconfig3#3920

See merge request !355

fixed remove mail-backups (Bernd Kilmer)



See merge request !356

please review the change!

Fixed issue #3955 DNS module: Limit for maximum zones can be circumvented with "import zone file" function.
Removed TODO string in error template.

Prevent 60 seconds delay in mailbox creation when mapping of mailbox zui and gid to web uid and gid is not used.

fixed expiring users on PW reset

closes ispconfig/ispconfig3#3913

See merge request !354

SQL Fix for xmpp edit domain

This is from and Closes #3943 

I am not the one who found this fix! Credits go to @linus9000

See merge request !353

This reverts commit bb664a22.

show error-message when a client / reseller change the ip for a domain that was created by the admin