Support for centralized configuration in multi environment setups

Request:

We have multiple environments where an eZPublish instance can be ran (development, integration, staging, production servers).

Settings for each environment (DatabaseSettings, SiteAccessSettings...) need to be stored somewhere.

So far we use a settings file stored on each server and a php script that automatically modifies our ezpublish INI files when rolling out.

It would be great to have an multi-environment settings mechanism in eZPublish able to get those environment settings from INI files, sparing the alteration of INI files directly on the servers (maybe somehow in the way Symfony does).