[development] menu alter (was node add)

[Karoly Negyesi]

> One caveat - in drupal5 you can only override the callback function.  
> any changes to 'access' will be silently ignored. this form of  
> altering is not supported in d5. it is supported in d6 wth  
> hook_menu_alter()

Right and let draw attention to this: people were doing terrible hacks to alter the menu, now you can easily with hook_menu_alter , one of the sweet features of the new system.