During setup, before wp-content.php is created and DB_USER is defined,
there is no way to instantiate it meaningfully.
Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
Wordpress 4 defaults to using mysqli_* functions in preference to
mysql_*. Since pg4wp only provides replacements for mysql_ functions,
we need to ensure that the mysql_* functions are called. Do this by
defining WP_USE_EXT_MYSQL to true.
Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
