title: What is HTTP header stands for 'x-auto-login'
body: <p>When i login with gmail , i see this header ('x-auto-login') in one of the http repsonse, what is the purpose of it:</p>
  
  <pre><code>gtglobal-ocsp.geotrust.com 
  :Alternate-Protocol: 443:quic
  Cache-Control: no-cache, no-store
  Content-Encoding: gzip
  Content-Type: text/html; charset=UTF-8
  Date: Thu, 06 Mar 2014 22:26:41 GMT
  Expires: Mon, 01-Jan-1990 00:00:00 GMT
  Pragma: no-cache
  Server: GSE
  Set-Cookie: GAPS=1:8823f898f8dsf8sd6g;Path=/;Expires=Sat, 05-Mar-2016 22:26:41 GMT;Secure;HttpOnly
  GALX=axHR8TU45uo;Path=/;Secure
  Strict-Transport-Security: max-age=10893354; includeSubDomains
  x-auto-login: realm=com.google&amp;args=service%3Dmail%26continue%3Dhttp%253A%252F%252Fmail.google.com%252Fmail%252F
  x-content-type-options: nosniff
  X-Frame-Options: DENY
  x-xss-protection: 1; mode=block
  X-Firefox-Spdy: 3.1
  </code></pre>
  
  <p>[Note: I have intentionally changed the cookie value for security reason]</p>