iSCSI: Logout hierarchy

[Michael Schoberg <michael_schoberg@cnt.com>]

Quick scenario:

A connection receives a logout message with recovery (ReasonCode = 2).  The
Logout response sets a Time2Wait & Time2Retain as negotiated at login.
Within these periods, a new Logout (implicit or explicit) request comes in
either to remove that exact connection or to destroy the whole session.
Should the target obey the new request or honor the previous?