Add a util function running_on_master() to improve code readablility

See merge request !1735

Use a regular update to avoid waking the slaveserver

Closes #6453

See merge request !1734

Sum for quota usage

Closes #6505

See merge request !1739

Bulk spaces to tabs in all CSS, #5522

See merge request !1740

Resolve "Rename Shell user to SSH/SFTP User"

Closes #6500

See merge request ispconfig/ispconfig3!1732

- /interface/web/sites/lib/lang/ar.lng
- /interface/web/sites/lib/lang/bg.lng
- /interface/web/sites/lib/lang/br.lng
- /interface/web/sites/lib/lang/ca.lng
- /interface/web/sites/lib/lang/cn.lng
- /interface/web/sites/lib/lang/cz.lng
- /interface/web/sites/lib/lang/de.lng
- /interface/web/sites/lib/lang/dk.lng
- /interface/web/sites/lib/lang/el.lng
- /interface/web/sites/lib/lang/en.lng
- /interface/web/sites/lib/lang/es.lng
- /interface/web/sites/lib/lang/fi.lng
- /interface/web/sites/lib/lang/fr.lng
- /interface/web/sites/lib/lang/hr.lng
- /interface/web/sites/lib/lang/hu.lng
- /interface/web/sites/lib/lang/id.lng
- /interface/web/sites/lib/lang/it.lng
- /interface/web/sites/lib/lang/ja.lng
- /interface/web/sites/lib/lang/nl.lng
- /interface/web/sites/lib/lang/pl.lng
- /interface/web/sites/lib/lang/pt.lng
- /interface/web/sites/lib/lang/ro.lng
- /interface/web/sites/lib/lang/ru.lng
- /interface/web/sites/lib/lang/se.lng
- /interface/web/sites/lib/lang/sk.lng
- /interface/web/sites/lib/lang/tr.lng

Fix stats for vhost alias #6386

Closes #6389

See merge request ispconfig/ispconfig3!1730

Resolve "API call to set DNSSEC algorithm and activate it."

Closes #6476

See merge request ispconfig/ispconfig3!1731

Merge branch '6428-postfix-advertises-smtputf8-but-local-lmtp-delivery-fails-because-dovecot-does-not-support-it' into 'develop'

Resolve "Postfix advertises SMTPUTF8 but local LMTP delivery fails because dovecot does not support it"

Closes #6428

See merge request !1727

Resolve "Failed message symbol in auth.log"

Closes #6442

See merge request !1728

Resolve "Follow-up to #5588 - Change the required FQDN for "Sectigo / Comodo""

Closes #6456

See merge request !1729

Add delete button to some edit forms

See merge request ispconfig/ispconfig3!1362

Add an info tab for the client page #5372

See merge request ispconfig/ispconfig3!941

Convert zone_file_prefix and slave_zone_file_prefix functions to config option

See merge request ispconfig/ispconfig3!1376

Support configurable IMAP prefix per mailbox

Closes #5918

See merge request ispconfig/ispconfig3!1605

Option calculate Website Disk usage without Quota

See merge request ispconfig/ispconfig3!1704

Add script to add a new string to multiple translation files

See merge request ispconfig/ispconfig3!1721

Resolve "Create webdomain form lists domains that are already used"

Closes #6491

See merge request ispconfig/ispconfig3!1715

Move the email field higher up on the client form, #6494

Closes #6494

See merge request ispconfig/ispconfig3!1718

Deprecate ICQ, #6493

Closes #6493

See merge request ispconfig/ispconfig3!1717

Move dns wizard function to class

Closes #6496

See merge request ispconfig/ispconfig3!1720