Add unidirectional chap support so we can authenticate to the target.
Make the login phase more "intelligent" so we can iterate over login
pdus until we have reached full feature phase
Add a new helper functions to parse a iscsi url and break it down
into elements in a structure
Update iscsi-inq to allow CHAP authentication
to take the URLs in the form
iscsi://<host>[:<port>]
and
iscsi://<host>[:<port>]/<target-iqn>/<lun>
instead of specifying the values as --portal/--target/--lun
