Describe the bug

Setting post_logout_redirect_uri in the oidc config is being ignored.

Steps to reproduce

1. Run ocis with an external idp, e.g. Keycloak
2. Set post_logout_redirect_uri to some url in oidc config
3. Open Web and logout

Expected behavior

The post_logout_redirect_uri is being respected during logout.

Actual behavior

It's not.