bug#63627: Improve plstore.el and fix various issues of it

[Jens Schmidt]

On 2023-09-16  12:13, Eli Zaretskii wrote:
>> Date: Thu, 14 Sep 2023 23:24:54 +0200
>> Cc: 63627@debbugs.gnu.org
>> From: Jens Schmidt <jschmidt4gnu@vodafonemail.de>
>>
>> Please consider for committing on emacs-29.
> 
> Thanks, but did you mean to say this should not be subsequently merged
> to master?  If so, you should tell that in the commit log message.

No, this should go to both emacs-29 and (by "automatic" subsequent
merging) also to master.  Sorry, I thought that was the default.

Thanks.