Update protect.inc.php from 1.2.6 version
Clears unwanted eval settin gin preg_replace
Set hard-coded mysql_ instructions to mysqli_
Otherwise install cannot work in PHP installation without mysql extension. Installs of PHP 5.0+ should always have mysqli extension available.
Merge pull request #418 from kp52/develop

Update protect.inc.php from 1.2.6 version