bug#44895: Add Info-copy-permalink

[Eli Zaretskii <eliz@gnu.org>]

> Date: Fri, 27 Nov 2020 11:14:18 +0300
> From: Jean Louis <bugs@gnu.support>
> Cc: 積丹尼 Dan Jacobson <jidanni@jidanni.org>,
>   44895@debbugs.gnu.org
> 
> This is similar to partial functions of `org-store-link' and to key
> `w' in *eww*, or to `c' to copy Node name in the Info buffer, with
> addition that capturing the hyperlink to the reference would construct
> the shareable link or could invoke integration to quickly send it to
> somebody.
> 
> If it is meant to obtain quick reference to be shared with somebody,
> partial construction of URL could be obtained with:
> 
> User could press let us say: `C' on the "14.18 Optional Mode Line
> Features" page, then the WWW hyperlink could be constructed in memory
> pointing to:
> https://www.gnu.org/software/emacs/manual/html_node/emacs/Optional-Mode-Line.html
> or snippet could be constructed with the title and URL such as:
> 
> Emacs Manual: 14.18 Optional Mode Line Features
> https://www.gnu.org/software/emacs/manual/html_node/emacs/Optional-Mode-Line.html
> 
> then by yanking snippet into email it can be shared easily with
> third party.

Are we talking only about "sharing" stuff in manuals related to Emacs?
What about any other Info manual?  And what about manuals that don't
have a Web site?

IOW, this proposed feature needs more detailed specification, IMO.