rsyslog does not load configuration snippet from /etc/rsyslog.d

Issue

• I have two systems, a test system and a production system

• On the testsystem I got this rsyslog configuration to work in /etc/rsyslog.d:

  $ModLoad imfile   # Load the imfile input module
  
  $InputFileName /var/log/dirsrv/slapd-<instance>/audit
  $InputFileTag RHDSAudit:
  $InputFileStateFile state-RHDSAudit1
  $InputFileSeverity debug
  $InputFilePollInterval 1
  $InputRunFileMonitor
  
  local0.debug /var/log/rhdsaudit
  

• On the test server this works fine: the file /var/log/rhdsaudit is filled with audit log info from the RHDS audit log.

• Now I want to recreate this setup with the same kind on the production server, but there the setup does not work: the /var/log/rhdsaudit is not created or filled.