New wiki page ubus session

I created a new WIki page

ATM the session management is described only here

But there is a lot of other methods that aren't documented anywhere:

ubus -v list session
'session' @4df86fe9

if anyone can put some small description of the methods that will be great. Especially interesting is the access method which is allowed for unauthenticated user.

This is very important topic because any issues with the session management can make the system vulnerable

The access method allows to query whether the current session is allowed to call a specific object and method. It does not allow to "access" things.

I just found that there is already described session methods on