RELENG_6 buildworld failure (amd64)

[Conrad J. Sabatier]

===> usr.bin/kdump
cc -O2 -pipe -fno-strict-aliasing -fomit-frame-pointer -ftracer 
-funit-at-a-time -march=athlon64 -I/usr/src/usr.bin/kdump/../ktrace
-I/usr/src/usr.bin/kdump/../..  -c ioctl.c
In file included from ioctl.c:74:
/usr/obj/usr/src/amd64/usr/include/netinet/ip_lookup.h:33: error:
`FR_GROUPLEN' undeclared here (not in a function)
/usr/obj/usr/src/amd64/usr/include/netinet/ip_lookup.h:61: error:
syntax error before "ioctlcmd_t"
In file included from ioctl.c:76:
/usr/obj/usr/src/amd64/usr/include/netinet/ip_scan.h:99: error: syntax
error before "ioctlcmd_t"
*** Error code 1

Stop in /usr/src/usr.bin/kdump.

I can't find any definition of FR_GROUPLEN anywhere.  What's going on
here?

-- 
Conrad J. Sabatier <conrads at cox.net> -- "In Unix veritas"