Enables logging to a file. If \fIfile\fR is specified, then it is
used as the exact name for the log file. The default log file name
used if \fIfile\fR is omitted is \fB@LOGDIR@/\*(PN.log\fR.
Enables logging to a file. If \fIfile\fR is specified, then it is
used as the exact name for the log file. The default log file name
used if \fIfile\fR is omitted is \fB@LOGDIR@/\*(PN.log\fR.