env_config

Rails.application.env_config stores some of the Rails initial environment parameters. Currently stores:

* "action_dispatch.parameter_filter"         => config.filter_parameters,
* "action_dispatch.secret_token"             => config.secret_token,
* "action_dispatch.show_exceptions"          => config.action_dispatch.show_exceptions,
* "action_dispatch.show_detailed_exceptions" => config.consider_all_requests_local,
* "action_dispatch.logger"                   => Rails.logger,
* "action_dispatch.backtrace_cleaner"        => Rails.backtrace_cleaner

These parameters will be used by middlewares and engines to configure themselves.