title: Difference between /topic, /queue for SimpleMessageBroker in Spring Websocket + SockJS
body: <p>Is there a clarification,  what is the differences between /topic, /queue etc. for Spring Websocket + SockJS in case I am using "simple broker" ? E.g. here <a href="https://stackoverflow.com/questions/22367223/sending-message-to-specific-user-on-spring-websocket">Sending message to specific user on Spring Websocket</a> it is said: <strong><em>when your client subscribe to an channel start with /user/, eg: /user/queue/reply, your server instance will subscribe to a queue named queue/reply-user[session id]</em></strong>  </p>
  
  <p>I would like to understand the logic behind such conversions in some clear way.</p>