title: HTTP Response code for "Please wait a little bit"
body: <p>What is the best HTTP response code for the server to send if it wants the client to wait for a little bit of time and then try the request again?</p>
  
  <p>Right now, I'm using:</p>
  
  <pre><code>409 Conflict
  </code></pre>
  
  <p>But this doesn't feel quite right...</p>