Actually imap logout
This ensures Geary.Imap.ClientService does a logout when closing sessions, as is suggested by RFC3501, and simplifies the Geary.Imap.ClientSession FSM a bit, making it match the RFC more closely.
This ensures Geary.Imap.ClientService does a logout when closing sessions, as is suggested by RFC3501, and simplifies the Geary.Imap.ClientSession FSM a bit, making it match the RFC more closely.