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Remove unused global variables as well as unused memory

Description

Remove unused global variables as well as unused memory
allocations from ipfilter in preparation for VNET support.

Suggested by: cy (see D7000)
Sponsored by: The FreeBSD Foundation
MFC after: 2 weeks
Approved by: re (gjb)

Details

Provenance
bzAuthored on
Parents
rS302288: Enable indirect segment I/Os by default in the Xen blkfront driver when
Branches
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