Added the possibility to provide the sendmail location in NOTIFICATION_SENDMAIL_MAILER.

Added NOTIFICATION_STORAGE_MAILER which allow to store the email in a storage (could be just output, file, database ...)
Added SMTP implementation, based on EiffelNet SMTP_PROTOCOL.
   note: it is possible to exclude this by setting ecf variable "smtp_notification_email_disabled" to "True"
   this way help to manage dependencies, since the Eiffel Net library would not be included neither.
Fixed Date header value computation.

library/runtime/process/notification_email/notification_sendmail_mailer.e

@@ -2,9 +2,9 @@ note
 	description : "[
 			NOTIFICATION_MAILER using sendmail as mailtool
 			]"
-	author: "$Author$"
-	date: "$Date$"
-	revision: "$Revision$"
+	author: "$Author: jfiat $"
+	date: "$Date: 2015-06-30 15:49:56 +0200 (mar., 30 juin 2015) $"
+	revision: "$Revision: 97588 $"
 
 class
 	NOTIFICATION_SENDMAIL_MAILER
@@ -16,23 +16,29 @@ inherit
 		end
 
 create
-	default_create
+	default_create,
+	make_with_location
 
 feature {NONE} -- Initialization
 
+	make_with_location (a_path: READABLE_STRING_GENERAL)
+		do
+			make (a_path, <<"-t">>)
+			set_stdin_mode (True, "%N.%N%N")
+		end
+
 	default_create
 		do
 			Precursor
-			make ("/usr/sbin/sendmail", <<"-t">>)
+			make_with_location ("/usr/sbin/sendmail")
 			if not is_available then
-				make ("/usr/bin/sendmail", <<"-t">>)
+				make_with_location ("/usr/bin/sendmail")
 			end
-			set_stdin_mode (True, "%N.%N%N")
 		end
 
 
 note
-	copyright: "2011-2013, Jocelyn Fiat, Javier Velilla, Olivier Ligot, Eiffel Software and others"
+	copyright: "2011-2015, Jocelyn Fiat, Javier Velilla, Olivier Ligot, Eiffel Software and others"
 	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
 	source: "[
 			Eiffel Software