Make messcompat.el obsolete.

* lisp/obsolete/messcompat.el: Move here from lisp/gnus.
* doc/misc/message.texi (Compatibility): Remove section.

lisp/obsolete/messcompat.el

@@ -0,0 +1,55 @@
+;;; messcompat.el --- making message mode compatible with mail mode
+
+;; Copyright (C) 1996-2016 Free Software Foundation, Inc.
+
+;; Author: Lars Magne Ingebrigtsen <larsi@gnus.org>
+;; Keywords: mail, news
+;; Obsolete-since: 25.2
+
+;; This file is part of GNU Emacs.
+
+;; GNU Emacs is free software: you can redistribute it and/or modify
+;; it under the terms of the GNU General Public License as published by
+;; the Free Software Foundation, either version 3 of the License, or
+;; (at your option) any later version.
+
+;; GNU Emacs is distributed in the hope that it will be useful,
+;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;; GNU General Public License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.
+
+;;; Commentary:
+
+;; This file tries to provide backward compatibility with sendmail.el
+;; for Message mode.  It should be used by simply adding
+;;
+;; (require 'messcompat)
+;;
+;; to the .emacs file.  Loading it after Message mode has been
+;; loaded will have no effect.
+
+;;; Code:
+
+(require 'sendmail)
+
+;(setq message-from-style mail-from-style)
+;(setq message-interactive mail-interactive)
+(setq message-setup-hook mail-setup-hook)
+(setq message-mode-hook mail-mode-hook)
+;(setq message-indentation-spaces mail-indentation-spaces)
+;(setq message-signature mail-signature)
+;(setq message-signature-file mail-signature-file)
+(setq message-default-headers mail-default-headers)
+(setq message-send-hook mail-send-hook)
+(setq message-send-mail-function send-mail-function)
+
+(provide 'messcompat)
+
+;;; messcompat.el ends here
+
+;; Local Variables:
+;; no-byte-compile: t
+;; End: