title: How to remove some headers from response
body: <p>I want to remove some headers from (Ruby on Rails) response.</p>
  <p>The header response:</p>
  <pre><code>HTTP/1.1 200 OK
  Date: Thu, 06 Jun 2013 14:42:26 GMT
  Connection: Keep-Alive
  X-Runtime: 0.01900
  Content-Type: text/plain; charset=utf-8
  Cache-Control: private, max-age=0, must-revalidate
  Server: WEBrick/1.3.1 (Ruby/1.8.7/2012-10-12)
  Content-Length: 281
  Etag: &quot;71078380e2824af40330c40e73fb9869&quot;,
  Set-Cookie: SV_session=BAh7BiIKZmxhc2hJQzonQWN0aW9uQ29udHJvbGxlcjo6Rmxhc2g6OkZsYXNo%250ASGFzaHsABjoKQHVzZWR7AA%253D%253D--c93221da69cab6c6d742157e1ef03841ea4e63e8; path=/
  </code></pre>
  <p>The headers that I want to remove or change are:</p>
  <pre><code>Connection: Keep-Alive (change to closed)
  X-Runtime: 0.01900 (remove this)
  Cache-Control: private, max-age=0, must-revalidate (remove this)
  Server: WEBrick/1.3.1 (Ruby/1.8.7/2012-10-12) (remove this)
  Etag:... (remove this)
  Set-Cookie:....(remove this)
  </code></pre>