MFC r267610 (by trasz): Rework session termination in iSCSI target to actually wait for any outstanding commands to be properly aborted by CTL. Without it, in some cases (such as files backing the LUNs stored on failing disk drives), terminating a busy session would result in panic.
MFC r267610 (by trasz):
Rework session termination in iSCSI target to actually wait
for any outstanding commands to be properly aborted by CTL.
Without it, in some cases (such as files backing the LUNs
stored on failing disk drives), terminating a busy session
would result in panic.

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