Mysql version check

[jenssegers]

Check out http://www.php.net/manual/en/mysqli.get-client-version.php to get the mysql version.

EDIT: fixed link

[jenssegers]

Additional:

• Don't check exec('mysql -V'), because you need to check for a client installation, not the server
• Check for PDO for redbean (probably included in PHP version)
• Regular mysql functions will be deprecated in PHP 5.5.0