Perhaps you should ask again if mysqli is supported.
LS 2.0 shoud support PDO and mysqli.
The documentation for LS2.0 stated support for
PDO database driver for MySQL (pdo_mysql or pdo_mysqli)
Not sure why it is called pdo_mysqli instead of mysqli.
You can try to check that with small php code.
See the connectionstrings here
dev.mysql.com/doc/refman/5.5/en/apis-php...fo.api.choosing.html