OIDC Back-Channel Logout

[lullis]

Is your feature request related to a problem? Please describe.
Currently DOT does not provide a way for the OP to indicate that the user has signed out, this causes RP sessions to be kept open in end
users agents even when they user believes that they signed out already.

Describe the solution you'd like
Back-Channel Logout allows for more reliable communication between RP and OP to indicate that the end user wishes to terminate its login session.

Additional context
This is part of the improvements ongoing for the Aleksis Project, which is extensively using DOT.