RE: libpq debug log

Hi Alvaro san

Thank you for your fix of trace log code.

> From: 'alvherre@alvh.no-ip.org' <alvherre@alvh.no-ip.org>
> Sent: Friday, April 2, 2021 11:30 AM
...
> It still didn't fix it!  Drongo is now reporting a difference in the expected trace --
> and the differences all seem to be message lengths.
> Now that is pretty mysterious, because the messages themselves are printed
> identically.  Perl's output is pretty unhelpful, but I wrote them to a file and diffed
> manually; it's attached.

Do ErrorResponse and NoticeResponse vary from test to test ...?
If so, it seemed difficult to make the trace logs available for regression test. 
I will also investigate the cause of this issue.

Regards,
Aya Iwata