PATCH: sftp-server logging.

[Dan Kaminsky]

> if you expect all ftpd features in sftp, then write your
> own sftpd.

i expect the basics of any file transfer daemon.  show me one that doesn't
log (ok besides samba, but you have no idea how horrific that protocol is.
there's a reason luke leighton scares everyone with his hex divining
skills.)

we're smart people, we know the difference between file transfer security
and code execution security. some companies don't.

they get hacked regularly.

--dan