Fix error handling in CLI mode, use STDERR and non-empty exit code (#1489043)

Aleksander Machniak

2013-04-26 f23ef1c96859f6b01a9268c8606a22ceb719cf3d

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<?php
require_once 'Net/IDNA2/Exception.php';
 
class Net_IDNA2_Exception_Nameprep extends Net_IDNA2_Exception
{
}