git: 9front

ref: 8e322e5a5b60c290f6a7cc65f8113bafae36a1e7
dir: /sys/src/cmd/troff/

FIXES
README
cvt
dwbinit.c
dwbinit.h
ext.h
find
fns.h
hytab.c
mbwc.c
mkfile
n1.c
n10.c
n2.c
n3.c
n4.c
n5.c
n6.c
n7.c
n8.c
n9.c
ni.c
popen.c
space.c
suftab.c
system.c
t10.c
t11.c
t6.c
tdef.h
unansi