stethoscope not redirecting time column correctly

Hi,

When setting stethoscope dumping to disk by `stethoscope -d <db-name> -o <output-file>`, the time column is printed in the console instead of the file.

In `MonetDB/clients/mapiclient/stethoscope.c` L113, it directly prints to stdout by `printf(""%s", ", ev->time);`. Is it on purpose?

Also, I can't follow this message[1] to profile MAL because it seems that the APIs have been changed. Where can I find the newest document?

Thanks, Jiading Guo

[1]: https://www.monetdb.org/pipermail/users-list/2013-May/006369.html