bug#44895: Add Info-copy-permalink

[Stephen Berman]

On Fri, 27 Nov 2020 11:14:18 +0300 Jean Louis <bugs@gnu.support> wrote:

> If person is reading email through Emacs and knows how to evaluate
> functions, one can also share it by using `c' and then constructing this:
>
> (info "(emacs) Optional Mode Line")

Typing `C-0 c' in the node adds just that to the kill-ring.

> it is little more tedious, then if there is option to quickly obtain
> human readable hyperlink.

In Gnus that is a human readable hyperlink (to the local Info manual,
not to the HTML version at gnu.org).

Steve Berman