[NGINX] Added new Proxy Buffers to the /SOGo Section

data/conf/nginx/includes/site-defaults.conf

@@ -199,6 +199,9 @@
     proxy_set_header x-webobjects-server-name $server_name;
     proxy_set_header x-webobjects-server-url $client_req_scheme://$http_host;
     proxy_set_header x-webobjects-server-port $server_port;
+    proxy_buffer_size 128k;
+    proxy_buffers 64 512k;
+    proxy_busy_buffers_size 512k;
     proxy_send_timeout 3600;
     proxy_read_timeout 3600;
     client_body_buffer_size 128k;