ref: 81b1fc5a1268bca74e854ebe4850c0c1b8b69ff3
dir: /acme/bin/Unspam/
#!/bin/rc
if(! ~ $#* 0){
	echo usage: Unspam >[1=2]
	exit usage
}
if(! ~ `{pwd} /mail/fs/*/[0-9]* || ! test -f raw || ! test -f unixheader){
	echo must run in mail directory >[1=2]
	exit 'bad dir'
}
cat unixheader raw | upas/unspam