Fix some broken link

controllers/nginx/Changelog.md

@@ -1,7 +1,5 @@
 Changelog
 
-Changelog
-
 ### 0.9-beta.11
 
 **Image:**  `gcr.io/google_containers/nginx-ingress-controller:0.9.0-beta.11`

controllers/nginx/rootfs/etc/nginx/template/nginx.tmpl

@@ -498,7 +498,7 @@ http {
     server {
         # Use the port 18080 (random value just to avoid known ports) as default port for nginx.
         # Changing this value requires a change in:
-        # https://github.com/kubernetes/contrib/blob/master/ingress/controllers/nginx/nginx/command.go#L104
+        # https://github.com/kubernetes/ingress/blob/master/controllers/nginx/pkg/cmd/controller/nginx.go
         listen 18080 default_server reuseport backlog={{ .BacklogSize }};
         {{ if $IsIPV6Enabled }}listen [::]:18080 default_server reuseport backlog={{ .BacklogSize }};{{ end }}
         set $proxy_upstream_name "-";