Merge "Update reverse proxy configuration example for nginx"

Documentation/config-reverseproxy.txt

@@ -99,7 +99,7 @@ as this one:
 	  listen 80;
 	  server_name review.example.com;
 
-	  location /r/ {
+	  location ^~ /r/ {
 	    proxy_pass        http://127.0.0.1:8081;
 	    proxy_set_header  X-Forwarded-For $remote_addr;
 	    proxy_set_header  Host $host;