Portable iSCSI - snapshot of current sources/changes

+ moved lba2cdb into iscsi-initiator.c and cdb2lba into disk.c
+ moved iscsi.c to protocol.c
+ calculate zero bytes and bits in a different way, and fix a bug or two
on the way
+ add the ability to trace different types of debug information from the
initiatior as well as the target

Update the external tree for new structure for reachover builds.

Add some iscsi-specific changes too:

Portable iSCSI - 20080207 to 20090622

+ Use modern autoconf
+ Add portable iSCSI initiator sources
+ New directory structure
+ Put OSD sources in their own directory
+ iscsi.h -> iscsiprotocol.h
+ add an iscsi.h for the new interface, and install it
+ globals_t -> iscsi_target_t
+ made an iscsi-target.h with all public functions in it
+ reformatted Intel license to fit in 80 columns
+ get rid of some abstractions which aren't needed any more
+ move over to a set of (name, value) tuples in target and initiator
+ add patch to set the target's StatSN at login time, from Gleb Kozyrev via
Mark Foster
+ add manual page for libiscsi(3)
+ update libiscsi shared object major version to 2 to reflect the changes
in API and ABI

More changes to come