Sets also validators default options.

Each validator can be configured thru CONTENIDO $cfg configuration variable. Example for email validator:

$cfg['validator']['email'] = array(
    // List of top level domains to disallow
    'disallow_tld' => array('.test', '.example', '.invalid', '.localhost'),
    // List of hosts to disallow
    'disallow_host' => array('example.com', 'example.org', 'example.net'),
    // Flag to check DNS records for MX type
    'mx_check' => false,
);