Compatibility with Drupal-HEAD and PHP 5

There are incompatibilities with both Drupal-HEAD and PHP 5. The Drupal-HEAD incompatibilities have to do with changes in node_list (). The PHP 5 changes have to do with unset () and PHP 5 being more particular not allowing array style references to objects.

A patch is attached. Still needs testing and is NOT backwards compatible with Drupal 4.6.x. My testing has been using subscribe on Drupal 4.6.3 and publish on Drupal-cvs.