New version of libiscsi: 1.8.0

[ronnie sahlberg]

A new version of libiscsi is avaiable : version 1.8.0

This version provides among other things:
- New logging/debugging system.
- malloc()/free() optimizations
- support for iovectors for reading/writing
- start of support for CDB unmarshallers
- fix deadlock when CMDSN is exhausted but we still need to write more
data before we can complete a command and thus grow the cmdsn window.
- redo completely how we manage unsolicited data
- New API to use NOPs to monitor the connection
- Lots of TESTS updates, including tests for PersistentReservations


libiscsi homepage : https://github.com/sahlberg/libiscsi

Tarball for this release is available as :
https://sites.google.com/site/libiscsitarballs/libiscsitarballs/libiscsi-1.8.0.tar.gz