Quoting Dan White <dwhite@olp.net>:
You could direct your syslog daemon to ignore those messages. Look for lines which include: *.debug local4.debug local4.*
I don't use syslogd, I run socklog-unix and socklog-klog services which are running under svlogd and listen directly to the OS's standard logging socket. I don't want to wholesale discount local4 messages because they might come from something else than slapd running in the foreground.
-mike