bug#64454: 30.0.50; In-Reply-To header obsolete content

[Eli Zaretskii]

> From: Andrew Cohen <acohen@ust.hk>
> Date: Tue, 04 Jul 2023 14:11:35 +0800
> 
> 
> When replying to an email, gnus constructs an In-Reply-To: header that
> contains the message-id of the originating email followed by a phrase of
> the form:
> 
> (User's  message of "Wed, 17 Nov 2021 22:16:04 -0800")
> 
> While allowed, the addition of this parenthetical phrase has been made
> obsolete as of RFC5322. I suggest removing it, or wrapping it in a
> defcustom 'message-strict-rfc5322. Any preferences?

If you decide to remove it, please make that conditional on a
defcustom, so that interested users will have a way to get back old
behavior, when they need that.

Thanks.