iSCSI draft 02: logout

[Matt Wakeley <matt_wakeley@agilent.com>]

Some comments on the logout command:

- In Section 2.15, it indicates that the logout command is only used for error
recovery.  I thought there were those that wanted to always use the logout to
close a connection cleanly.

- One would think that a "logout" on the last TCP connection of a session
would close the session.  However, the error recovery steps in section 4.1
seem to imply otherwise.  If closing the last TCP connection of a session does
not close the session, what does?

- A target should be allowed to "logout" an initiator.  This is allowed in
fibre channel.  It might be nice to have a reason code field indicating why
the logout was performed.