The long_hostnames(off) directive is deprecated according to the syslog-ng.conf man page. Reproducible: Always Steps to Reproduce: 1. Look at the syslog-ng man page. Actual Results: long_hostnames is deprecated. Expected Results: Replace long_hostnames with chain_hostnames. long_hostnames is not even listed in the online reference for both syslog-ng 1.6 and 2.0.
fixed in CVS. Thanks for the bug report.