initial prototype based on nat-as-server

cli/cleanup_sessions.php

@@ -0,0 +1,21 @@
+<?php
+/**
+ * CLI: Remove expired sessions from the database.
+ * Usage: php cli/cleanup_sessions.php
+ */
+if (php_sapi_name() !== 'cli') {
+    http_response_code(403);
+    echo "CLI only\n";
+    exit(1);
+}
+
+require_once __DIR__ . '/../common.php';
+require_once __DIR__ . '/../db_init.php';
+
+[$pdo, $tmpDb, $lockFp] = qdb_open(true);
+$stmt = $pdo->prepare("DELETE FROM session WHERE expiresAt < :now");
+$stmt->execute([':now' => time()]);
+$removed = $stmt->rowCount();
+qdb_save($tmpDb, $lockFp);
+
+echo "Removed $removed expired session(s).\n";