Move session into an extractor minus client listener changes.

src/lib.rs

@@ -37,7 +37,7 @@ impl MoreThanText {
         let mut msg = Message::new(MsgType::SessionValidate);
         match session {
             Some(id) => msg.add_data("sess_id", id.into()),
-            None => {},
+            None => {}
         }
         let rx = self.client_link.send(msg);
         let reply = rx.recv().unwrap();