zabbix-agent: Monitor accounting information for syslog-ng

Signed-off-by: Florian Pritz <bluewind@xinu.at>

roles/zabbix-agent/files/systemd-discover-accounting-units.py

@@ -28,6 +28,7 @@ unit_whitelist_regexes = [
         r'postgresql.service',
         r'quassel.service',
         r'security-tracker-update.service',
+        r'syslog-ng@.*.service',
         r'spampd.service',
         r'sshd.service',
         r'svnserve.service',