Re: PATCH: numeric timestamp in log_line_prefix

About the feature: I find it is a good thing. It may help scripting over 
the logs, for instance to compute delays between events, whereas the full 
date-time-tz syntax is maybe nice but heavier to work with afterwards.

In addition to the comments already made (typo in doc, padding...):

+    sprintf(timestamp_str, "%ld.%.03d",
+            tv.tv_sec, (int)(tv.tv_usec / 1000));

I'm not sure that the "." in "%.03d" is useful. ISTM that it is used for 
floatting point formatting, but is not needed with integers.

-- 
Fabien.