scalability improvement: don't force a conversion of the string to a list (for sites, having e.g. several 10k sub nodes on a site node)on one site, this change reduces the overall processing time of a requests from ~16-20ms to ~4ms
Undeprecate and reimplement: require_admin_request, can_admin_request_p, require_notify_object and can_notify_object_p. Fixes in two templates (request-delete, request-change-frequency). (Many thanks to Felix Mödritscher for the patch!)
