v0.2.0s adds TLS support to v0.2.0

CHANGELOG

• Add config.json options ""full_cert_filename" and "priv_cert_filename" which enable TLS.
  "full_cert_filename" is the full certificate chain (in .pem or other format accepted by Go runtime)
  "priv_cert_filename" is the private key for the certificate

• Add config.json options "jwt_login_url", "jwt_cookie_name", "jwt_secret_key" for auth using JWT.
  "jwt_login_url" is the redirect login url if JWT is missing or invalid
  "jwt_cookie_name" is the name of the cookie where the JWT is expected
  "jwt_secret_key" is the base64 (standard RFC 4648) of the HS256 secret

• Add config.json option "proxy_path_urls" which is a map of string to string with paths for keys (e.g. "/login") and urls for values (e.g. "https://my-login-server.com/login")

The *cert* and jwt* parameters should be used with the --addr :443 command-line option (unless an encrypting proxy is used).