My web server, uses the same pattern.  There&#x27;s an article explaining it in details here: <a href="http:&#x2F;&#x2F;tia.mat.br&#x2F;posts&#x2F;2014&#x2F;10&#x2F;06&#x2F;life_of_a_http_request.html" rel="nofollow">http:&#x2F;&#x2F;tia.mat.br&#x2F;posts&#x2F;2014&#x2F;10&#x2F;06&#x2F;life_of_a_http_request.ht...</a>