* lisp/message.el (message-mimic-kill-buffer): Bind
`message-kill-buffer-and-remove-file' to nil while calling the function
`message-kill-buffer'.
* texi/message-ja.texi, texi/message-ja.texi: Update.
* lisp/lpath.el: Fbind `replace-regexp-in-string' for XEmacs and Mule;
don't fbind coding-system-list for Mule.
(cf. news://news.gnus.org/gnus.gnus-bug #48523)
* lisp/message.el (message-kill-buffer-and-remove-file): New user option.
(message-kill-buffer): Don't remove the backup file if
`message-kill-buffer-and-remove-file' is nil.