Enable CF proxy with multi-level CNAME chain

thanks @svanlund I get

SSL_ERROR_NO_CYPHER_OVERLAP in Firefox
ERR_SSL_VERSION_OR_CIPHER_MISMATCH in Chrome

If we remove the 2nd CNAME redirect and point directly to Azure

foo.bar.commyapp.azurewebsites.net we can turn the proxy on and everything resolves and the certs are fine.