Please note that this commit modifies the ABI structure passed between
    kernel and userland.  If you are using PF (packet filter), both the
    kernel and pfctl must be recompiled and pfctl needs the kernel's new
    pfvar.h, e.g.:

    (build and install new kernel)
    ...
    (build and install new pfctl)

	cp /usr/src/sys/net/pf/pfvar.h /usr/include/net/pf/pfvar.h
	cd /usr/src/usr.sbin/pfctl
	make clean obj depend all install

    A buildworld/kernel sequence also works of course, I'm simply describing
    how to avoid doing a full buildworld.

					    -Matt

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