Open source third party OIDC support

crates/directory/src/backend/oidc/config.rs

@@ -1,11 +1,7 @@
 /*
  * SPDX-FileCopyrightText: 2020 Stalwart Labs Ltd <hello@stalw.art>
  *
- * SPDX-License-Identifier: LicenseRef-SEL
- *
- * This file is subject to the Stalwart Enterprise License Agreement (SEL) and
- * is NOT open source software.
- *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
  */
 
 use std::time::Duration;