Refactored WSF_HANDLER_CONTEXT

- removed path_parameter
  - added `item' to include WSF_REQUEST.item
  - marked obsolete `parameter'

The goal is to remove confusion, remove URI_TEMPLATE specific `path_parameter'
and provide a way to use ctx.item (..) to also include meta variable, query, form, ... items

library/server/wsf/router/uri/wsf_uri_handler_context.e

@@ -21,15 +21,13 @@ feature {NONE} -- Initialization
 			path := p
 		end
 
-feature -- Query	
+feature -- Item		
 
-	path_parameter (a_name: READABLE_STRING_8): detachable WSF_VALUE
+	item (a_name: READABLE_STRING_8): detachable WSF_VALUE
+			-- Variable value for parameter or variable `a_name'
+			-- See `{WSF_REQUEST}.item(s)'
 		do
-		end
-
-	query_parameter (a_name: READABLE_STRING_8): detachable WSF_VALUE
-		do
-			Result := request.query_parameter (a_name)
+			Result := request.item (a_name)
 		end
 
 note