Add debug message when sending email

git-svn-id: https://simplesamlphp.googlecode.com/svn/trunk@997 44740490-163a-0410-bde0-09ae8108e29a

lib/SimpleSAML/XHTML/EMail.php

@@ -93,7 +93,7 @@ Content-Transfer-Encoding: 8bit
 		$headers = join("\r\n", $this->headers);
 
 		$mail_sent = @mail($this->to, $this->subject, $message, $headers);
-		
+		SimpleSAML_Logger::debug('Email: Sending e-mail to [' . $this->to . '] : ' . ($mail_sent ? 'OK' : 'Failed'));
 		if (!$mail_sent) throw new Exception('Error when sending e-mail');
 	}