Lfun-Gruppe Shadow

• destruct_shadow
• forbidden_shadow
• init_shadow
• notify_shadow
• notify_unshadow
• query_prevent_shadow
• query_shadow
• query_shadow_creator
• query_shadow_object
• query_shadow_owner
• remove_shadow
• shadow_create_action
• shadow_remove_action
• unshadow_shadow
• update_actions