Add some of the source code from MySQL 8.0.41.

Author: wangbin579

plugin/audit_null/CMakeLists.txt

@@ -0,0 +1,33 @@
+# Copyright (c) 2006, 2024, Oracle and/or its affiliates.
+# 
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2.0,
+# as published by the Free Software Foundation.
+#
+# This program is designed to work with certain software (including
+# but not limited to OpenSSL) that is licensed under separate terms,
+# as designated in a particular file or component or in included license
+# documentation.  The authors of MySQL hereby grant you an additional
+# permission to link the program and your derivative works with the
+# separately licensed software that they have either included with
+# the program or referenced in the documentation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License, version 2.0, for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
+
+MYSQL_ADD_PLUGIN(audit_null
+  audit_null.cc
+  MODULE_ONLY
+  MODULE_OUTPUT_NAME "adt_null"
+  )
+MYSQL_ADD_PLUGIN(test_security_context
+  test_security_context.cc
+  MODULE_ONLY
+  TEST_ONLY
+  )