kgssapi won't build, I need prison help

No, I know how to get thrown in prison:-), but I don't know what
"prison" should be used by the rpcsec_gss server (options KGSSAPI).

options KGSSAPI doesn't build right now. One place is just in need
of jail.h, but in another, it still uses "hostid". I assume this
should become pr_hostid, but for what "prison"? (would prison0.pr_host
be ok?)

Thanks in advance for any help, rick
--- build failure, in case you're interested ---
cc -c -O -pipe  -std=c99 -g -Wall -Wredundant-decls -Wnested-externs -Wstrict-prototypes  -Wmissing-prototypes -Wpointer-arith -Winline -Wcast-qual  -Wundef -Wno-pointer-sign -fformat-extensions -nostdinc  -I. -I../../.. -I../../../contrib/altq -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h -fno-common -finline-limit=8000 --param inline-unit-growth=100 --param large-function-growth=1000  -mno-align-long-strings -mpreferred-stack-boundary=2  -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 -ffreestanding -fstack-protector -Werror  ../../../rpc/rpcsec_gss/svc_rpcsec_gss.c
../../../rpc/rpcsec_gss/svc_rpcsec_gss.c: In function 'svc_rpc_gss_find_client':
../../../rpc/rpcsec_gss/svc_rpcsec_gss.c:511: error: 'hostid' undeclared (first use in this function)
../../../rpc/rpcsec_gss/svc_rpcsec_gss.c:511: error: (Each undeclared identifier is reported only once
../../../rpc/rpcsec_gss/svc_rpcsec_gss.c:511: error: for each function it appears in.)
../../../rpc/rpcsec_gss/svc_rpcsec_gss.c: In function 'svc_rpc_gss_create_client':
../../../rpc/rpcsec_gss/svc_rpcsec_gss.c:546: error: 'hostid' undeclared (first use in this function)