только что наткнулся
HTTP/1.1 200 OK
Server: nginx/1.7.12
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
Etag: W/"6cfe86ddb4b5e07a7280270edf53c8ee"
Content-Encoding: gzip
Strict-Transport-Security: max-age=10886400; includeSubdomains
X-Hi-Human: The Production Infrastructure team added this header. Come work with us! Email kevin.rice+hiring@airbnb.com
Content-Length: 20773
Cache-Control: public, max-age=521
Date: Thu, 06 Aug 2015 15:14:14 GMT
Connection: keep-alive
Server: nginx/1.7.12
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
Etag: W/"6cfe86ddb4b5e07a7280270edf53c8ee"
Content-Encoding: gzip
Strict-Transport-Security: max-age=10886400; includeSubdomains
X-Hi-Human: The Production Infrastructure team added this header. Come work with us! Email kevin.rice+hiring@airbnb.com
Content-Length: 20773
Cache-Control: public, max-age=521
Date: Thu, 06 Aug 2015 15:14:14 GMT
Connection: keep-alive