v0.0.114

improve handling of error pages (#146)

the current version can handle files missing, but it can not handle
directories missing.

https://docs.stakater.com/mto/main/reference-guides/admin-clusterrole.html
Fails to show a nice looking 404.

https://docs.stakater.com/mto/main/obviously_missing_file
succeeds.

With this change, both should work.

Not sure what internal does or if is needed, have tested on a local
nginx only.