Use configdir instead of *xchatdir*

plugins/perl/lib/Xchat.pod

@@ -683,18 +683,13 @@ C<$id>   -  one of the following case sensitive values
   <td></td>
 </tr>
 <tr>
-   <td>hexchatdir</td> <td>HexChat config directory encoded in UTF-8<br />
+   <td>configdir</td> <td>HexChat config directory encoded in UTF-8<br />
                      examples:<br />
                      /home/user/.config/hexchat<br />
                      C:\Users\user\Appdata\Roaming\HexChat
                      </td>
    <td></td>
 </tr>
-
-<tr>
-   <td>hexchatdirfs</td>  <td>same as hexchatdir except encoded in the locale file system encoding</td>
-   <td></td>
-</tr>
 </table>
 
 <p>This function is used to retrieve certain information about the current