Operation Manual

even after a restart of the syslog-ng daemon, there is an additional entry
SYSLOGD_ADDITIONAL_SOCKET_DHCP in the le /etc/sysconfig/syslog.
26.4 For More Information
More information about DHCP is available at the Web site of the Internet Systems
Consortium (http://www.isc.org/products/DHCP/). Information is also
available in the dhcpd, dhcpd.conf, dhcpd.leases, and dhcp-options man
pages.
456 Reference