Move some mysql/mariadb utilities to maxutils

Can be used in system tests later on.

maxutils/maxsql/include/maxsql/ccdefs.hh

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2018 MariaDB Corporation Ab
+ *
+ * Use of this software is governed by the Business Source License included
+ * in the LICENSE.TXT file and at www.mariadb.com/bsl11.
+ *
+ * Change Date: 2022-01-01
+ *
+ * On the date above, in accordance with the Business Source License, use
+ * of this software will be governed by version 2 or later of the General
+ * Public License.
+ */
+
+#pragma once
+
+/**
+ * @file ccdefs.hh
+ *
+ * This file should be included first by all maxsql headers.
+ */
+
+#if !defined (__cplusplus)
+#error This file is only to be included by C++ code.
+#endif
+
+#include <maxbase/ccdefs.hh>
+
+/**
+ * All classes of MaxSql are defined in the namespace @c maxsql.
+ */
+namespace maxsql
+{
+}
+
+/**
+ * Shorthand for the @c maxsql namespace.
+ */
+namespace mxq = maxsql;