Custom PHP variables are not apply when configured in Directive Snippet

See merge request ispconfig/ispconfig3!1209

Merge branch '5784-missing-symlinks-to-etc-letsencrypt-live-on-certbot-during-install-update' into 'develop'

Resolve "Missing symlinks to /etc/letsencrypt/live on certbot during install/update"

Closes #5784

See merge request ispconfig/ispconfig3!1228

Resolve "subdomains DKIM Signing & rspamd"

Closes #5782

See merge request !1227

Resolve "Can't change Directives Snippes"

Closes #5780

See merge request ispconfig/ispconfig3!1226

Resolve "Don't use getcwd inside the installer"

Closes #5781

See merge request !1225

Only use NameVirtualHost for Apache 2.2 (#4230)

Closes #4230

See merge request ispconfig/ispconfig3!1223

no need to verify recipient addresses for rspamd

See merge request ispconfig/ispconfig3!1224

clear negative address verify cache every 60s

Closes #5772

See merge request ispconfig/ispconfig3!1217

Resolve "dataLogTimer is not defined"

Closes #5119

See merge request !1221

Sieve redirect needs :copy

See merge request ispconfig/ispconfig3!1220

Resolve "autoinstall.ini haven't option for new question"

Closes #5763

See merge request ispconfig/ispconfig3!1218

Removed minified js file as it is unused

This reverts merge request !1215

Resolve "Autoresponder not working due to sieve error"

Closes #5774

See merge request ispconfig/ispconfig3!1216

Remove address_verify_sender_ttl (#5772)

Closes #5772

See merge request !1215

Make DNSSEC available when value is null (PowerDNS) (#5571)

Closes #5771

See merge request ispconfig/ispconfig3!1214

Resolve "Installer does not issue LE certificate"

Closes #5767

See merge request ispconfig/ispconfig3!1213

# Conflicts:
#   install/install.php
#   install/lib/installer_base.lib.php
#   install/update.php

Resolve "ACME vhost entry is not created"

Closes #5769

See merge request !1212