drop hardcoded configs around TLS 1.x (#232)
drop hardcoded configs around TLS 1.x (#232)

Modern Go versions (1.9 and 1.10) as of this commit are much better
about cipher suite selection and the ssl/tls protocols used. In fact,
SSLv3 needs to be explicitly enabled now.

Fixes: https://github.com/cesanta/docker_auth/issues/231
cesanta/docker_auth