Version 4.0.1

- Fixed a bug where certain vendor-specific RADIUS attributes were not passed through correctly. - The Authentication Proxy will not attempt to constantly connect to the Duo Single Sign-on service with expired credentials. - Fixed a bug with binary LDAP attributes that caused certain authentications to fail. - Fixed a bug that caused the Windows authproxy_passwd tool to fail for secrets containing the % character. - The error output when the Authentication Proxy cannot start TLS encryption due to missing configuration is clearer.