Arch Linux

Description:
Arch provides syslog-ng 3.23.1 with config for 3.17.
Syslog-ng 3.22 and newer changes some behavior and new version requires config modification.
I'm not sure how to make proper fix, but changing
@version: 3.17 to @version: 3.22
fixes issue for me.

Additional info:
https://www.syslog-ng.com/technical-documents/doc/syslog-ng-open-source-edition/3.22/release-notes

Steps to reproduce:
1. Install syslog-ng
2. Try to start
3. Check logs for error

Log:
Sep 21 14:33:08 localhost syslog-ng[493]: syslog-ng starting up; version='3.23.1'
Sep 21 14:33:08 localhost syslog-ng[493]: WARNING: log-fifo-size() works differently starting with syslog-ng 3.22 to avoid dropping flow-controlled messages when log-fifo-size() is misconfigured. From now on, log-fifo-size() only affects messages that are not flow-controlled. (Flow-controlled log paths have the flags(flow-control) option set.) To enable the new behaviour, update the @version string in your configuration and consider lowering the value of log-fifo-size().;