From: Tino Calancha <tino.calancha@gmail.com>
Date: Thu, 29 Jun 2017 15:46:50 +0900
emacs -Q
M-x eww https://lists.gnu.org/archive/html/emacs-devel/ RET
*) The url is not shown.
*) M-x list-processes RET
shows Status 'failed' for the connection.
*) With Emacs-25.2 the url is shown after a few seconds.
Crystal ball says that you have some local configuration that
disallows acceptance of expired certificates. By default Emacs asks
whether to accept such a certificate, and if you allow, the URL will
be shown.
Someone should report to GNU hackers that their certificate needs to
be updated.