Add configurable defaults and allow use of tokens

This is all on a new git clone of branch 6.x-1.x.
I'm seeing the following notice on viewing a node_reply enabled node:

user notice: The node_reply_message_form() function called token replacement with an array rather than a string for $text in /opt/www/powysm6/html/modules/token/token.module on line 263.

I had a look at the code in function node_reply_message_form() and looked at the code in token.module line 252 onwards and then tried the following fix on line 225 in node_reply.module.
replace

  $text = token_replace_multiple($text, $tokens);

with

  foreach ($text as $key => $value) {
    $text[$key] = token_replace_multiple($value, $tokens);
  }

This stops the notice from appearing but I don't know for sure if it affects anything else.
Programatically is looks like the right thing to do IMO.