this patch adds a read of VPD page 0x80 (unit serial number) after successful login.
The serial is then validated on secutive reconnects to avoid the accidental mismatch
of LUN ids if some kind of remapping appears between loss of connection and a later
reconnect.
An additional url parameter force_usn is added to enforce the usn right from the beginning.
If not set via url or the new iscsi_set_unit_serial_number function the usn is learned
at the first successful login.
Signed-off-by: Peter Lieven <pl@dlhnet.de>
Change the reference to the 'src' directory into a reference to the 'utils'
directory since commit c07779cfa7 ("AUTOTOOLS: Add a Makefile.am for the
iscsi-* utilities") renamed the 'src' directory into 'utils'.
Document the purpose of the test-tool directory.
Fix the link to the release tarballs.
