Scheme should be https

[dknecht]

https://github.com/facebookexperimental/doh-proxy/blob/c5d0d4a03da38a5f2c36282b2c37923b7aa2dc89/dohproxy/protocol.py#L134

https://tools.ietf.org/html/rfc7540#section-8.1.2.3

The ":scheme" pseudo-header field includes the scheme portion of the target URI ([RFC3986], Section 3.1).

It currently fails for doh-client --domain dns.cloudflare.com --qname www.cloudflare.com --debug --post because we are doing strict validation.

[chantra]

Thanks @dknecht I will look into fixing it when times allows. If you have a local fix, PR is welcomed :)

[dknecht]

Thanks. You beat me to it.