Resolve "mail transport + @domain relay recipient = open relay"

Closes #6218

See merge request ispconfig/ispconfig3!1511

Add slovak translation for templates

Closes #6265

See merge request ispconfig/ispconfig3!1550

Merge branch '6269-redirects-render-invalid-apache-config-on-non-ssl-web-server-since-mr-1521-jdsn' into 'develop'

Only add SSLProxyEngine in proxy mode and when SSL is enabled for the web (fixes #6269)

Closes #6269

See merge request ispconfig/ispconfig3!1549

Create symlinks for conveniance, SFTP user should not land in an empty dir.

Closes #6240

See merge request ispconfig/ispconfig3!1529

Resolve "letsencrypt_renew_hook.sh error restarting services on centos"

Closes #6255

See merge request ispconfig/ispconfig3!1542

6187-DS-RECORD-functions-for-API -> Update dns.inc.php and other related files

Closes #6187

See merge request ispconfig/ispconfig3!1493

Add ipv6 option for dns_templatezone_add()

Closes #6239

See merge request ispconfig/ispconfig3!1528

Update jk_init.ini.master: add php8.1

See merge request ispconfig/ispconfig3!1547

Dsync backup: global options must be placed before the actual command

Closes #6243

See merge request !1532

Merge branch '5889-place-reject_rbl_client-after-permit_sasl_authenticated-in-postfix-config' into 'develop'

Resolve "Place reject_rbl_client after permit_sasl_authenticated in postfix config"

Closes #5889

See merge request !1531

SSLProxyEngine is neither needed for http(s) redirects nor for non-SSL proxy configs.
Thus excluding it from these cases.

Based on a fix by Thom <thom@amsterdamtech.nl>

Update rspamd_classifier-bayes.conf.master with junk_threshold

See merge request ispconfig/ispconfig3!1537

jailkit: add utilities to 'wp' jail

See merge request ispconfig/ispconfig3!1539

Resolve "installer symlink warnings / mishandling(?)"

Closes #6254

See merge request ispconfig/ispconfig3!1541

Set amavis group for 50-user to make it readable in Debian 11

Closes #6237

See merge request ispconfig/ispconfig3!1530

Update jQuery

See merge request ispconfig/ispconfig3!1535

6163 confidential issue

See merge request ispconfig-confidential/ispconfig3!5

Resolve "3.2.7: remote api login fails if restricted by remote_ips"

Closes #6244

See merge request ispconfig/ispconfig3!1534

Improve API security

See merge request ispconfig/ispconfig3!1533

Resolve "installer certificate symlink handling"

Closes #6238

See merge request ispconfig/ispconfig3!1527

Merge branch 'develop' of git.ispconfig.org:ispconfig-confidential/ispconfig3 into confidential-develop