+### 'template_vars'
+is called before vars are passed to the template engine to render the page.
+The registered function can add,change or remove variables passed to template.
+$b is an array with:
+
+ 'template' => filename of template
+ 'vars' => array of vars passed to template
+
+### ''acl_lookup_end'
+is called after the other queries have passed.
+The registered function can add, change or remove the acl_lookup() variables.
+
+ 'results' => array of the acl_lookup() vars
+
+