Limit email backup tab through client limits (#5732)

Closes #5732

See merge request ispconfig/ispconfig3!1250

# Conflicts:
#   install/sql/incremental/upd_dev_collection.sql
#   install/sql/ispconfig3.sql
#   interface/web/client/form/client.tform.php
#   interface/web/client/form/client_template.tform.php
#   interface/web/client/form/reseller.tform.php
#   interface/web/client/lib/lang/br_client.lng
#   interface/web/client/lib/lang/br_client_template.lng
#   interface/web/client/lib/lang/br_reseller.lng
#   interface/web/client/templates/client_edit_limits.htm
#   interface/web/client/templates/client_template_edit_limits.htm
#   interface/web/client/templates/reseller_edit_limits.htm

Merge branch '6226-syntax-error-in-upd_0093-sql-causes-software_-tables-not-to-be-dropped' into 'develop'

Resolve "Syntax error in upd_0093.sql causes software_* tables not to be dropped"

Closes #6226

See merge request !1520

Merge branch '6221-installer-doesn-t-account-for-dangling-symlinks-of-letsencrypt-hook-files' into 'develop'

Resolve "installer doesn't account for dangling symlinks of letsencrypt hook files"

Closes #6221

See merge request !1516

Missing asterisk for libnss*.so.*

See merge request !1518

Resolve "duplicate forwards allowed"

Closes #6212

See merge request !1513

Update jk_init.ini.master - incorporate upstream (v2.22) changes and glob match some pathnames

See merge request !1497

Resolve "chroot jail not created for chroot php-fpm mode website"

Closes #6209

See merge request !1504

Resolve "New SSL certificate code not migrated to nginx plugin"

Closes #6220

See merge request !1515

Resolve "CSR request not created or saved in ISPConfig 3.2.5"

Closes #6183

See merge request !1514

Resolve "improve letsencrypt renew hook"

Closes #6191

See merge request !1492

Merge branch '6214-failed-to-restart-clamd-amavisd-service-unit-clamd-amavisd-service-not-found' into 'develop'

Resolve "Failed to restart clamd.amavisd.service: Unit clamd.amavisd.service not found."

Closes #6214

See merge request !1506

Update rspamd_antivirus.conf.master:  don't skip virus scanning for text and image attachments.

See merge request !1495

Resolve "php cache collisions for chroot mode php-fpm"

Closes #6177

See merge request ispconfig/ispconfig3!1507

Add Debian 11 (Bullseye) to OS detection code in ISPConfig and update config for Debian testing (Sid)

Merge branch '6216-installation-fails-to-generate-le-certificate-running-forced-update-nightly-succeeds' into 'develop'

Resolve "Installation fails to generate LE certificate - running forced update nightly succeeds."

Closes #6216

See merge request !1509

Merge branch '6216-installation-fails-to-generate-le-certificate-running-forced-update-nightly-succeeds' into 'develop'

Resolve "Installation fails to generate LE certificate - running forced update nightly succeeds."

Closes #6216

See merge request !1508

Deployment of packages on release

See merge request !1496

Resolve "rename mail_user should update spamfilter_users"

Closes #5484, #6145, #6201, and #6200

See merge request !1500