+Lists_Check(struct list_head *h, CLIENT *Client)
+{
+ return Lists_CheckReason(h, Client) != NULL;
+}
+
+/**
+ * Check if a client is listed in a list and return the "reason".
+ *
+ * @param h List head.
+ * @param Client Client to check.
+ * @return true if client is listed, false if not.
+ */
+char *
+Lists_CheckReason(struct list_head *h, CLIENT *Client)