auth documentation obsolete?

[Miguel Barreiro]

The kernel reference manual documents the functions open/1, node_cookie/1
and node_cookie/2 that no longer exist in the source code. As far as I can
tell from reading the sources, some versions ago you could have inbound
and outbound cookies for other nodes, and that functionality is being
removed; the missing functions seem related to this cleaning.

Regards,

Miguel