v0.7.0

Spec Changes

• Requests containing URLs without a scheme are no longer accepted.
• The server will stop redirecting the root URL "gemini://example.com" to
  "gemini://example.com/". These URLs are cannonically the same per the url RFC
  definition and should both return successful responses.
• The CGI variable TLS_CLIENT_HASH now formats the certificate hash as
  "SHA256:<HASH>" where <HASH> is uppercase hexidecimal. The old base64
  fingerprint will still be available as TLS_CLIENT_HASH_B64 to help migrate
  existing CGI scripts, but it's recommended that you support the new hash
  format moving forward.