feature: provide initial Rspamd support (#2902)

target/scripts/startup/setup-stack.sh

@@ -89,6 +89,27 @@ function _setup_amavis
   fi
 }
 
+function _setup_rspamd
+{
+  _log 'warn' 'Rspamd support is under active development, expect breaking changes at any time'
+
+  if [[ ${ENABLE_AMAVIS} -eq 1 ]] || [[ ${ENABLE_SPAMASSASSIN} -eq 1 ]]
+  then
+    _shutdown 'You cannot run Amavis/SpamAssassin and Rspamd at the same time'
+  fi
+
+  if [[ ${ENABLE_CLAMAV} -eq 1 ]]
+  then
+    _log 'debug' 'Rspamd will use ClamAV'
+    mv /etc/rspamd/local.d/disabled/antivirus.conf /etc/rspamd/local.d/antivirus.conf
+  else
+    _log 'debug' 'Rspamd will not use ClamAV (which has not been enabled)'
+  fi
+
+  _log 'warn' 'Only running with default configuration'
+  _log 'warn' 'You will need to adjust the Postfix configuration yourself to use Rspamd as of now'
+}
+
 function _setup_dmarc_hostname
 {
   _log 'debug' 'Setting up DMARC'