Obsolence of rlogin.el

[Michael Albinus]

Hi,

I propose to mark rlogin.el as obsolete in Emacs 27. We don't need its
functionality any longer.

It's major functionality, an interactive shell on a remote host, is
available by a combination of Tramp (a remote default-directory), and
the `shell' command.

The other unique feature of rlogin.el, tracking directory changes, works
for local files in shell.el, and it works partly for remote files. In
rlogin.el it doesn't work proper, because remote files (for example in
compilation-minor-mode) are accessed by ange-ftp.

Instead of reworking rlogin.el it looks more promising to polish shell.el.
 
There is also the comment in rlogin.el:
 
;; FIXME?
;; Maybe this file should be obsolete.
;; https://lists.gnu.org/r/emacs-devel/2013-02/msg00517.html
;; It only adds rlogin-directory-tracking-mode.  Is that useful?

Comments?

Best regards, Michael.