bug#54764: encode-time: make DST and TIMEZONE fields of the list argument optional ones

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 20 Apr 2022 11:19:29 -0700
> Cc: manikulin@gmail.com, emacs-orgmode@gnu.org, 54764@debbugs.gnu.org,
>  Gnulib bugs <bug-gnulib@gnu.org>
> From: Paul Eggert <eggert@cs.ucla.edu>
> 
> > Thanks, the test-gettime-res test says "gettime_res returned 625000
> > ns", which is a strange number: it doesn't fit any MS-Windows system
> > time resolution figure I know about.  Do you happen to know what does
> > this number represent, and why it is the result of gettime-res.c when
> > it runs on MS-Windows?
> 
> It comes from current_timespec samples taken by gettime_res. Evidently 
> something is going wrong, either in gettime_res or in current_timespec.
> 
> I stared at the code a bit and see one possible problem, which I fixed 
> by installing the attached patch into Gnulib. I then generated a new 
> test-gettime-res.tgz compressed tarball (also attached); could you give 
> it a try?
> 
> This tarball is the result of running ./gnulib-tool as before, except I 
> added an extra print statement executed if you pass an extra argument to 
> that test program. So if you run the test and it's still outputting an 
> outlandish value for the resolution, please run the command:
> 
> gltests/test-gettime-res x
> 
> and let's take a look at its (long) debugging output.

I get the same result, and moreover I see no differences between this
and the previous tarball, and no printouts in test-gettime-res.c.  Did
you perhaps attach the wrong tarball this time?

Thanks.