Add a way to relax the OAuth https constraint

Context

Nuxeo allows configuring OAuth clients in order to provide authentication to an external application.

The client redirect URIs are expected to be in https (or the host is localhost) otherwise Nuxeo will stop the OAuth flow.
This is an issue when deploying applications locally in Kubernetes, because the application URL are not on localhost.

Request

We want to add a way to relax the https constraint for local deployments. A solution could be to check the dev mode.