git: 9front

ref: f9fd6981241f28f056efe9be8db4dfc39266bee4
dir: /sys/lib/troff/term/

tab.37
tab.450
tab.450-12
tab.dumb
tab.i300
tab.lp
tab.post
tab.think
tab.thinkbold
tab.thinksmall
tab.utf