Import upstream v0.16.22, stripped

Upstream commit: 474dd0229cb20cf513036619781ed97bd8073c3f
Enterprise-only files removed or emptied: 63
Enterprise-only snippets removed: 117 in 50 files
Dangling module declarations removed: 5
Cargo edits turning enterprise off: 14
Verification: clean
Enterprise feature gates left for rebuilt features: 19 in 18 files

Produced by tools/fork/strip.py. The full report is in docs/fork/strip-reports/ on main.

tests/src/directory/mod.rs

@@ -0,0 +1,25 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Stalwart Labs LLC <[email protected]>
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
+ */
+
+pub mod discovery;
+pub mod integration;
+pub mod ldap;
+#[cfg(feature = "sqlite")]
+pub mod sql;
+pub mod synchronization;
+pub mod unavailable;
+
+#[tokio::test(flavor = "multi_thread")]
+pub async fn directory_tests() {
+    ldap::test().await;
+    oidc::test().await;
+    unavailable::test().await;
+    discovery::test().await;
+    #[cfg(feature = "sqlite")]
+    sql::test().await;
+    synchronization::test().await;
+    integration::test().await;
+}