However, since we also use/query ES directly, a proxy would work far better than changing Kibana.
In the discussion above, it was decided (by Shay) that the place to do it would be at the ES level.
The following is a proposal to achieve it at the ES level. This is
some very early planning and I've decided to post it early to make sure
I'm not duplicating work or am on a totally wrong path (which is totally
possible). Any feedback/comments are appreciated.