ref: 06ac3cf30beeb3a284ac9f6d23c4121036355c10
dir: /acme/bin/Isspam/
#!/bin/rc
if(! ~ $#* 0){
	echo usage: Isspam >[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/isspam