Bug#774711: OpenSSH settings hardening

Hi,

Some updates on OpenSSH config hardening

1) The ssh-audit tool that Mathew Binkley pointed out has been forked 
and updated and lives at

   https://github.com/jtesta/ssh-audit

2) The sshaudit.com site now uses the above version.

3) The sshaudit.com site also now provides a hardening guide

   https://www.ssh-audit.com/hardening_guides.html

that was inspired by the original stribika.github.io page mentioned here.

I like Mathew's idea of aiming for a config that scores well, with 
commented out configs for enabling compatibility for older clients.