--- controllers/application_controller.rb.orig	2011-09-20 04:15:14.000000000 +0000
+++ controllers/application_controller.rb	2011-09-20 05:10:17.000000000 +0000
@@ -58,6 +58,11 @@
     Setting.check_cache
     # Find the current user
     User.current = find_current_user
+
+    # Enables logging usernames in apache access log
+    if User.current.logged?
+       response.headers["X-Username"] = User.current.name(:username)
+    end
   end
 
   # Returns the current user or nil if no user is logged in