This object specifies whether Pairwise Zoning is enabled in this
Zone.
When Pairwise Zoning is enabled in a Zone, the behaviors of members
in this Zone will be controlled through their roles. The members
with the same role ('initiator' or 'target') can't communicate with
each other, but those with different roles or with the same role
'both' can communicate with each other.
When Pairwise Zoning is disabled in a Zone, the behaviors of members
in this Zone will not be affected by their roles.