[MERGE] Add mail-mode GNU Emacs mail package as a mail_client option.

[Xavier Maillard]

   > This is my second attempt at adding GNU Emacs mail-mode as a
   > potentiel mail_client.

   I'm rather leery of adding two different ways of sending mail through
   Emacs.  Is there no way to support them both?

I do not understand. My patch and Bojan's one does support both.
Isn't what you want ? Anyway, I do not see how you can have a
unique mail_client entry for emacs when there are two
possibilities offered. How the module should be informed that a
user want messsage-mode or mail-mode ?

Regards,

	Xavier
-- 
http://www.gnu.org
http://www.april.org
http://www.lolica.org