bug#44895: Add Info-copy-permalink

[Jean Louis]

* Stephen Berman <stephen.berman@gmx.net> [2020-11-27 12:45]:
> 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).

I have expressed me wrongly.

All those info hyperlinks are well readable.