> It's more probable that David has outdated certificate DB and/or
> outdated GnuTLS on his machine.

Thanks once again to Microsoft for obeying Dorey's Law of Marketing with 
"safelinks", I only belatedly see David's evidence included "--2022-09-26 
09:12:58--" which rather says that his clock wasn't messed up, contra my 
earlier suggestion.

martind@sirius:~$ < /dev/null openssl s_client -connect alpha.gnu.org:https > 
/dev/null
depth=2 C = US, O = Internet Security Research Group, CN = ISRG Root X1
verify return:1
depth=1 C = US, O = Let's Encrypt, CN = R3
verify return:1
depth=0 CN = ftp.gnu.org
verify return:1
DONE
martind@sirius:~$

"ISRG Root X1" rings a bell.  Ah yes, it's that old chestnut: 
https://www.openssl.org/blog/blog/2021/09/13/LetsEncryptRootCertExpire/, which 
contains advice for David.  I also found the work around from 
https://www.mail-archive.com/debian-lts@lists.debian.org/msg09627.html 
specifically:

sudo rm /usr/share/ca-certificates/mozilla/DST_Root_CA_X3.crt

... to be helpful.

________________________________
From: Bug-make <bug-make-bounces+martin.dorey=hds....@gnu.org> on behalf of Eli 
Zaretskii <e...@gnu.org>
Sent: Monday, September 26, 2022 10:10
To: psm...@gnu.org <psm...@gnu.org>
Cc: david.s.bo...@gmail.com <david.s.bo...@gmail.com>; bug-make@gnu.org 
<bug-make@gnu.org>
Subject: Re: GNU make 4.3.90 release candidate available

***** EXTERNAL EMAIL *****

> From: Paul Smith <psm...@gnu.org>
> Cc: bug-make@gnu.org
> Date: Mon, 26 Sep 2022 12:31:34 -0400
>
> On Mon, 2022-09-26 at 12:16 -0400, David Boyce wrote:
> > BTW wget complains about the certificate:
> >
> > $ wget 
> > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Falpha.gnu.org%2Fgnu%2Fmake%2Fmake-4.3.90.tar.gz&amp;data=05%7C01%7CMartin.Dorey%40hitachivantara.com%7Cedd8aca6f47745c3454608da9fee5eb7%7C18791e1761594f52a8d4de814ca8284a%7C0%7C0%7C637998146567397614%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=LhGTvaG7H%2FEhlZTyhWwdwar%2Bxy2DdFbd1mMcNM1dGXI%3D&amp;reserved=0
> > --2022-09-26 09:12:58--  
> > https://nam04.safelinks.protection.outlook.com/?url=https%3A%2F%2Falpha.gnu.org%2Fgnu%2Fmake%2Fmake-4.3.90.tar.gz&amp;data=05%7C01%7CMartin.Dorey%40hitachivantara.com%7Cedd8aca6f47745c3454608da9fee5eb7%7C18791e1761594f52a8d4de814ca8284a%7C0%7C0%7C637998146567397614%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C3000%7C%7C%7C&amp;sdata=LhGTvaG7H%2FEhlZTyhWwdwar%2Bxy2DdFbd1mMcNM1dGXI%3D&amp;reserved=0
> > Resolving alpha.gnu.org (alpha.gnu.org)... 209.51.188.21, 2001:470:142:3::c
> > Connecting to alpha.gnu.org (alpha.gnu.org)|209.51.188.21|:443... connected.
> > ERROR: cannot verify alpha.gnu.org's certificate, issued by '/C=US/O=Let\'s 
> > Encrypt/CN=R3':
> >   Issued certificate has expired.
> > To connect to alpha.gnu.org insecurely, use `--no-check-certificate'.
>
> Oddly I don't get this warning.  Maybe I have somehow asked wget to not
> check expirations?

It's more probable that David has outdated certificate DB and/or
outdated GnuTLS on his machine.

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