title: Does the order of headers in an HTTP response ever matter?
body: <p>Is it ever meaningful whether the order of headers is</p>
  
  <pre><code>A: 1
  B: 2
  </code></pre>
  
  <p>vs</p>
  
  <pre><code>B:2
  A:1
  </code></pre>
  
  <p>I'm trying to figure out if I can use a dictionary to store a list of headers or if it needs to be some kind of list or ordered dictionary.</p>