Remove [experimental flag](https://github.com/elastic/beats/blob/master/libbeat/template/template.go#L148) from `append_fields`, as this feature is often recommended to users to customize their templates. Removing experimental note has been discussed with @urso some time ago.
Remove experimental flag from
append_fields, as this feature is often recommended to users to customize their templates.Removing experimental note has been discussed with @urso some time ago.