--- comment.module-4.6.2	2005-06-29 21:53:35.000000000 +0200
+++ comment.module	2005-07-18 13:06:23.000000000 +0200
@@ -429,6 +429,8 @@
 function comment_validate_form($edit) {
   global $user;
 
+  module_invoke_all('comment', 'validate', $edit);
+
   // Validate the comment's subject.  If not specified, extract
   // one from the comment's body.
   if (trim($edit['subject']) == '') {
@@ -1411,6 +1413,9 @@
   // format selector
   $form .= filter_form('format', $edit['format']);
 
+  // Invoke other forms
+  $form .= implode('', module_invoke_all('comment', 'form', $edit));
+
   // preview button:
   $form .= form_hidden('cid', $edit['cid']);
   $form .= form_hidden('pid', $edit['pid']);