cleanup, docs

site/doc/pages/mysql_disconnect.txt

@@ -13,4 +13,6 @@ Closes an existing connection to a MySQL server.
 Call this when you are done using a `MySQL*` connection handle.
 
 :example
-print("mysql_disconnect is resource-bound; configure the service or connection, then call it in request code.\n");
+MySQL* db = mysql_connect();
+if(db != 0) { mysql_disconnect(db); print("connection closed\n"); }
+else print("(requires a reachable MySQL server)\n");