pf log files

pf is logging as directed in pf.conf.  it creates the file pflog in =
/var/log.  However, there are a bunch of pflog.bad.nnnnnnn files where =
the n's appear to be random characters.  Each of them has only one line =
like:

Jul 20 00:00:00 mail newsyslog[69857]: logfile turned over

There is no pflog.bad entry in /etc/newsyslog.conf  The conf.d entry in =
newsyslog.conf is commented out.  What is generating these files?  Can =
it be disabled?

-- Doug