* adds whitelisting for map proxy hosts
* fixes documentation and variable names on oauth token revocation * introduces private key for propagation * changes key usage in decryption of propagated user data from oauth_client_id to private propagation key
* adds celery setting to .env.sample
* adds env usage for sso settings
* updates env.sample
* refactors settings into env usage * adds proxy usage for schneider parcel fetching (using public web address instead of internal ip address)
