Integrated new system to handle form_parameter, input_data in relation with MIME handling

This is not yet clear how to let the user precise its own MIME handler
but it is in progress

library/server/wsf/src/wsf_mime_handler.e

@@ -0,0 +1,27 @@
+note
+	description: "Summary description for {WSF_MIME_HANDLER}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+deferred class
+	WSF_MIME_HANDLER
+
+feature -- Status report
+
+	valid_content_type (a_content_type: READABLE_STRING_8): BOOLEAN
+		deferred
+		end
+
+feature -- Execution
+
+	handle (a_content_type: READABLE_STRING_8; a_content_length: NATURAL_64; req: WSF_REQUEST;
+			a_vars: TABLE [WSF_VALUE, READABLE_STRING_32]; a_raw_data: detachable CELL [detachable STRING_8])
+			-- Handle MIME content from request `req', eventually fill the `a_vars' (not yet available from `req')
+			-- and if `a_raw_data' is attached, store any read data inside `a_raw_data'
+		require
+			valid_content_type: valid_content_type (a_content_type)
+		deferred
+		end
+
+end