* Before 1.4.5/1.5.1 hooks were placed in ShowTableInfo() function.
* In 1.1.3-1.4.1 they were called in do_hook function with two or
* three arguments. Since 1.4.1 hooks are called in concat_hook_function.
* Before 1.4.5/1.5.1 hooks were placed in ShowTableInfo() function.
* In 1.1.3-1.4.1 they were called in do_hook function with two or
* three arguments. Since 1.4.1 hooks are called in concat_hook_function.