TT#45617 document new log-mark-prefix/suffix options

Change-Id: I6e7772974f54d1938ed0fc9d6f926b080c415688

daemon/rtpengine.pod

@@ -244,11 +244,21 @@ Write SRTP keys to error log instead of debug log.
 Log to stderr instead of syslog.
 Only useful in combination with B<--foreground>.
 
-=item B<-E>, B<--no-log-timestamps>
+=item B<--no-log-timestamps>
 
 Don't add timestamps to log lines written to stderr.
 Only useful in combination with B<--log-stderr>.
 
+=item B<--log-mark-prefix>
+
+Prefix to be added to particular data fields in log files that are deemed
+sensitive and/or private information. Defaults to an empty string.
+
+=item B<--log-mark-suffix>
+
+Suffix to be added to particular data fields in log files that are deemed
+sensitive and/or private information. Defaults to an empty string.
+
 =item B<--num-threads=>I<INT>
 
 How many worker threads to create, must be at least one.