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

Remove duplicate query

See merge request ispconfig/ispconfig3!1714

One was also without a placeholder

Resolve "Create a shell user - PHP Fatal error:  Uncaught TypeError: realpath()"

Closes #6472

See merge request ispconfig/ispconfig3!1713

Resolve "wrong databases are shown when selecting a server."

Closes #6480

See merge request ispconfig/ispconfig3!1712

Add Simplified Chinese translations for ISPConfig

Closes #6484

See merge request ispconfig/ispconfig3!1707

Extend Two-factor authentication

Closes #2558

See merge request ispconfig/ispconfig3!1594

fixes #6431 // make sure config file is deleted only during spamfilter_user event.

Closes #6431

See merge request ispconfig/ispconfig3!1674

Paste email address to select mail domain

Closes #6294

See merge request ispconfig/ispconfig3!1571

Early return when no LE domains remain, #6446

Closes #6446

See merge request ispconfig/ispconfig3!1685

simplify redhat os detection for the Nginx EL workaround

Closes #6485

See merge request ispconfig/ispconfig3!1708

Improve client circle page

See merge request ispconfig/ispconfig3!1710

Merge branch '6416-undefined-constant-loglevel_warning-in-usr-local-ispconfig-server-plugins-available' into 'develop'

Resolve "Undefined constant "LOGLEVEL_WARNING" in /usr/local/ispconfig/server/plugins-available/mysql_clientdb_plugin.inc.php:283"

Closes #6416

See merge request ispconfig/ispconfig3!1667

Use PHP from path in server.sh

See merge request ispconfig/ispconfig3!1676

gentoo specific updates

See merge request ispconfig/ispconfig3!1664

Include minor number in apache version for vhost.conf.master, #6471

Closes #6471

See merge request ispconfig/ispconfig3!1700

account root should be owned by root, #6462

Closes #6462

See merge request ispconfig/ispconfig3!1693