Add some forwarding options to nginx and some log stuff to uwsgi

* nginx needs to add X-Forwarded-For and REMOTE_ADDR headers to get the
  IP address properly
* uwsgi now logs 400 errors and adds the REMOTE_ADDR to the log file

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

nginx.conf

@@ -13,5 +13,7 @@ server {
     location / {
         include uwsgi_params;
         uwsgi_pass app:3031;
+        uwsgi_param HTTP_X-Forwarded-For $proxy_add_x_forwarded_for;
+        uwsgi_param REMOTE_ADDR $proxy_add_x_forwarded_for;
     }
 }

uwsgi.ini

@@ -1,5 +1,6 @@
 [uwsgi]
-logformat = %(method) %(status) %(uri) %(proto)
+logformat = %(method) %(status) %(addr) %(uri) %(proto)
+log-4xx = true
 log-5xx = true
 #uid = uwsgi
 processes = 5