We write unsolicited data-out PDUs from two places;
when we originally write the command in iscsi_scsi_command_async()
but also when we re-queue the PDUs during a session reconnect.
The re-queuing during the session re-connect was recently (almost) fixed
but was still buggy in that it did not correctly clamp the amount of written
data as per first burst length restriction.
This attempts to fix that.
Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>
2f5d21b09c