UTF8 Urls support

The comment URL may include all UTF8

I've successfully integrated Hebrew Urls for this module.

The comment_page_cleanstring function is too agressive and strips all non-english characters from the URL.

To be truly i18n compatible - there is almost no need for string cleaning.
All we need is to clean the chars which has special URL meaning, and make sure the url is utf8-encoded.

Fuller explanation about the pathauto treatment of utf8 urls support

Patch (line 273 and above):

  // Preserve alphanumerics, everything else becomes a separator
/* AL */
//  $pattern = '/[^a-zA-Z0-9]+/ ';
//  $output = preg_replace($pattern, $separator, $output);

              $special_chars = array ("?",":","&","@","~","+","_","\"","'",";",".");
              $output = str_replace($special_chars, "", $string);
/* AL End */