From: Bob Rogers <rogers-emacs@rgrjr.homedns.org>
   Date: Wed, 29 Dec 2021 17:01:01 -0500

      From: Paul Eggert <eggert@cs.ucla.edu>
      Date: Wed, 29 Dec 2021 11:29:44 -0800

      * I suggest preferring the symbol 'rfc-email' for parsing
      email-related dates, for consistency with the --rfc-email option
      of GNU 'date'. This should use the current RFC (5322 now, perhaps
      updated later).

The only update I saw at https://www.rfc-editor.org (RFC6854) only
affects addressing syntax.

   I started with RFC822 and RFC2822 because I had copies of these lying
   around; you're right that I should have looked for more recent
   standards.  And using rfc-email as a synonym for the latest version is a
   good idea.

FYI, there is no substantial difference between RFC2822 and RFC5322 in
date/time syntax.  They hide the whitespace in different productions,
but the end result is the same.  So I'll change the format name to
rfc5322 and add rfc-email as a synonym.

					-- Bob