Merge branch 'do_not_buffer' into 'master'

Do not let nginx buffer git http requests

Fixes #769

See merge request !465

files/gitlab-cookbooks/gitlab/templates/default/nginx-gitlab-http.conf.erb

@@ -160,6 +160,13 @@ server {
     proxy_connect_timeout   300;
     proxy_redirect          off;
 
+    # Do not buffer Git HTTP responses
+    proxy_buffering off;
+
+    # Pass chunked request bodies to gitlab-git-http-server as-is
+    proxy_request_buffering off;
+    proxy_http_version 1.1;
+
     proxy_set_header    Host                $http_host;
     proxy_set_header    X-Real-IP           $remote_addr;
     <% if @https %>