M http.go → http.go

@@ -583,6 +583,7 @@ session, _ := SessionStore.Get(r, "cookie-session")
 			session.Values["auth_user"] = userName
 			session.Values["impersonating_user"] = user.Username
 			session.Save(r, w)
+			log.Printf("User %s impersonated %s", user.Username, userName)
 			http.Redirect(w, r, "/", http.StatusSeeOther)
 			return
 		}