`telnet' is not documented in the manual.

A possible NEWS entry could be along these lines:

    ** telnet-mode

    reverting a buffer in `telnet-mode' will restart a closed connection.

Thank you!

 Emílio

2016-02-23 13:17 GMT+01:00 Lars Ingebrigtsen <larsi@gnus.org>:
Emilio Lopes <eclig@gmx.net> writes:

> The following patch allows one to use `revert-buffer' to restart a
> closed telnet/rsh connection.  It also defines `ssh' as an alias for
> `rsh' since `remote-shell-program' is set to `ssh' by default anyway.
>
> Regards
>
>  Emílio
>
> --- lisp/ChangeLog    2014-08-21 08:40:29 +0000
> +++ lisp/ChangeLog    2014-08-21 14:57:57 +0000
> @@ -1,3 +1,9 @@
> +2014-08-21  Emilio C. Lopes  <eclig@gmx.net>
> +
> +    * net/telnet.el (telnet-connect-command): New variable.
> +    (telnet-revert-buffer): New function.
> +    (telnet-mode): use `telnet-revert-buffer' as `revert-buffer-function'.
> +    (telnet, rsh): Set `telnet-connect-command' according to their
> call parameters.

I think this looks good.  Could you also submit changes for NEWS and the
manual (if the manual documents telnet.el, that is, I haven't checked).

--
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no