PSARC/2010/006 - removal of iSCSI Userland Target

The COMSTAR target is in OpenSolaris for several versions. So a PSARC case was introduced to remove the userland implementation of iSCSI in Opensolaris. Today the change found it’s way into the codebase. There is just one thing that i don’t like about it: There is no shareiscsi=on anymore, as the new administrative model doesn’t really fit into such an option. But otherwise the new implementation is much better and versatile.