Description:
------------
When foreign characters are used in the configuration file, tidy will make php crash.


Reproduce code:
---------------
Setup php.ini to use a configuration file:
tidy.default_config = /path/to/tidy.conf

Add a line with foreign chars, I used this line:
#  Author: ?rjan Persson

Now try use tidy:
<?php
ob_start('ob_tidyhandler');
?>

Expected result:
----------------
Parsed configuration.

Actual result:
--------------
Crashed.