Hardware - office24, IBM Thinkcentre, MSL library host.
Software - latest Tumbleweed (I ran an update this morning):

# syslog-ng -F -f /etc/syslog-ng/syslog-ng.conf
[2015-12-07T14:05:14.618955] WARNING: Configuration file format is too old,
syslog-ng is running in compatibility mode Please update it to use the
syslog-ng 3.7 format at your time of convinience, compatibility mode can
operate less efficiently in some cases. To upgrade the configuration, please
review the warnings about incompatible changes printed by syslog-ng, and once
completed change the @version header at the top of the configuration file.;
[2015-12-07T14:05:14.620453] WARNING: Your configuration uses a newly
introduced reserved word as identifier, please use a different name or enclose
it in quotes before upgrading; keyword='template_function',
config-version='3.5', version='3.7',
filename='/usr/share/syslog-ng/include/scl/cim/template.conf', line='23:1'
Error parsing config, root plugin template-function not found in
/usr/share/syslog-ng/include/scl/cim/template.conf at line 23, column 1:
                                                   included from
/etc/syslog-ng/scl.conf line 32, column 1
                                                   included from
/etc/syslog-ng/syslog-ng.conf line 3, column 1

template-function "format-cim" "$(format-json --pair @timestamp='${R_ISODATE}'
--pair @message='${MSG}' --key .cim.* --shift 5 --key _* --key .*
--replace-prefix .=_ --key *.*)\n";
^^^^^^^^^^^^^^^^^