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/utils/temp_dir.rs

@@ -0,0 +1,37 @@
+/*
+ * SPDX-FileCopyrightText: 2020 Stalwart Labs LLC <[email protected]>
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-SEL
+ */
+
+pub struct TempDir {
+    pub path: std::path::PathBuf,
+    pub delete: bool,
+}
+
+impl TempDir {
+    pub fn new(name: &str, delete_if_exists: bool) -> Self {
+        let mut path = std::env::temp_dir();
+        path.push(name);
+        if delete_if_exists && path.exists() {
+            std::fs::remove_dir_all(&path).unwrap();
+        }
+        std::fs::create_dir_all(&path).unwrap();
+        Self {
+            path,
+            delete: delete_if_exists,
+        }
+    }
+
+    pub fn delete(&self) {
+        std::fs::remove_dir_all(&self.path).unwrap();
+    }
+}
+
+impl Drop for TempDir {
+    fn drop(&mut self) {
+        if self.delete {
+            let _ = std::fs::remove_dir_all(&self.path);
+        }
+    }
+}