ref: 9ef4ba83f62761b517db23a16e2f61e5861aae23
dir: /sys/lib/man/mksearchindex/
#!/bin/rc awk ' { if($2 in a) a[$2] = a[$2] " " $1; else a[$2] = $1; } END { for(i in a) print " " a[i] " " i; } '< /sys/lib/man/lookman/index |sed 's/ \/sys\/man\/(.*)\/(.*)/ \2 \1\/\2/' | sort