ref: 8d0d2ec80f06f3d7d8ba44313cd08eaef5d9b5d1
dir: /sys/lib/man/permind/dup1.awk/
function install(){lastf=$NF; last=$0; split($0,b,"\"")}
$NF!=lastf {if(last!="") print last; install()}
$NF==lastf {split($0,a,"\"")
if(a[6]~/[-,]/||a[6]~/\(mi/) {
split(a[6],aa,"[, ]")
if(index(last,aa[1])==0) {
print last
install()
}
else if(b[6]!~/[,-]/&&b[6]!~/\(mi/)
install()
}
}
END {print last}