+ * Callback to process a request and produce a response
+ *
+ * @param req_str JSON-encoded request
+ * @param data pointer to a MONS_INSTANCE
+ * @return pointer to the response string or null to send no response
+ */
+static char *mons_req_cb(TALLOC_CTX *mem_ctx, const char *req_str, void *data)
+{
+ return "This is a response.";
+}
+
+/**