bug#28831: 27.0.50; debbugs: funny address in To field

[Tino Calancha]

X-Debbugs-CC: michael.albinus@gmx.de
X-Debbugs-CC: larsi@gnus.org

Recently when using debbugs to list the bug reports,
I see a new address in the 'To' as 'xxxxx@https:'
with xxxxx the bug number.  For instance, this is the
headers from Bug#24000:

From: "Greg A. Woods" <woods@robohack.ca>
Subject: bug#24000: 24.5; makefile-bsdmake-mode has incomplete keyword syntax
To: 24000@debbugs.gnu.org, 24000@https:
Date: Fri, 15 Jul 2016 15:28:43 -0700 (1 year, 12 weeks, 6 days ago)
Resent-From: "Greg A. Woods" <woods@robohack.ca>
Reply-To: "Greg A. Woods" <woods@robohack.ca>

When I reply such reports the funny address appear in CC.
What are those '24000@https:'? Do we need them?

In GNU Emacs 27.0.50 (build 16, x86_64-pc-linux-gnu, GTK+ Version 3.22.11)
 of 2017-10-14
Repository revision: dcb86584fd12fc44d246bbe033372693785c127d