Added possibility to disable proxy_request_buffering in nginx

Change-Id: I52313b2a59401aebe05c79c0c0cde88dcb1c7a72
Closes-bug: PROD-15961
diff --git a/README.rst b/README.rst
index cde94d3..cbf35a8 100644
--- a/README.rst
+++ b/README.rst
@@ -245,6 +245,7 @@
             enabled: true
             type: nginx_proxy
             proxy:
+              request_buffer: false
               buffer:
                 number: 8
                 size: 16
diff --git a/nginx/files/proxy.conf b/nginx/files/proxy.conf
index 845d781..eb3c06c 100644
--- a/nginx/files/proxy.conf
+++ b/nginx/files/proxy.conf
@@ -70,6 +70,10 @@
       proxy_buffering off;
       {%- endif %}
 
+      {%- if not site.proxy.get('request_buffer', True) %}
+      proxy_request_buffering off;
+      {%- endif %}
+
       proxy_http_version 1.1;
 
       {%- if site.proxy.get('headers', True) %}