Document OIDC_ENABLED in settings.rst (#1408)

* Document OIDC_ENABLED in settings.rst

* change settings to ref oidc.rst and from there ref the openid.net site.

---------

Co-authored-by: Alan Crosswell <[email protected]>

Author: charleswhchan

docs/oidc.rst

@@ -4,8 +4,8 @@ OpenID Connect
 OpenID Connect support
 ======================
 
-``django-oauth-toolkit`` supports OpenID Connect (OIDC), which standardizes
-authentication flows and provides a plug and play integration with other
+``django-oauth-toolkit`` supports `OpenID Connect <https://openid.net/specs/openid-connect-core-1_0.html>`_
+(OIDC), which standardizes authentication flows and provides a plug and play integration with other
 systems. OIDC is built on top of OAuth 2.0 to provide:
 
 * Generating ID tokens as part of the login process. These are JWT that

docs/settings.rst

@@ -146,7 +146,7 @@ OAUTH2_SERVER_CLASS
 ~~~~~~~~~~~~~~~~~~~
 The import string for the ``server_class`` (or ``oauthlib.oauth2.Server`` subclass)
 used in the ``OAuthLibMixin`` that implements OAuth2 grant types. It defaults
-to ``oauthlib.oauth2.Server``, except when OIDC support is enabled, when the
+to ``oauthlib.oauth2.Server``, except when :doc:`oidc` is enabled, when the
 default is ``oauthlib.openid.Server``.
 
 OAUTH2_VALIDATOR_CLASS
@@ -287,6 +287,13 @@ According to `OAuth 2.0 Security Best Current Practice <https://oauth.net/2/oaut
 - Public clients MUST use PKCE `RFC7636 <https://datatracker.ietf.org/doc/html/rfc7636>`_
 - For confidential clients, the use of PKCE `RFC7636 <https://datatracker.ietf.org/doc/html/rfc7636>`_ is RECOMMENDED.
 
+OIDC_ENABLED
+~~~~~~~~~~~~
+Default: ``False``
+
+Whether or not :doc:`oidc` support is enabled.
+
+
 OIDC_RSA_PRIVATE_KEY
 ~~~~~~~~~~~~~~~~~~~~
 Default: ``""``