x509 extension new version is out

[Roumen.Petrov at skalasoft.com]

Hi All,

Please visit http://satva.skalasoft.com/~rumen/openssh/ to get new version with support for x509 certificate.
- added authorization by 'Distinguished Name';
- added x509 CA store (new options in sshd_config);
- client certificate is verified against CA certificates in x509 store;
- added shell scripts to create 'Test CA' and test client certificates.

Diffs aviable for OpenBSD and portable versions.