Before this patch, the result code was a mixture of `int` and
`CURLcode`.
Also adjust casts and fix a couple of minor issues found along the way.
Cherry-picked from #13489Closes#13600
- Use CERT_CONTEXT's pbCertEncoded to determine chain order.
CERT_CONTEXT from SECPKG_ATTR_REMOTE_CERT_CONTEXT contains
end-entity/server certificate in pbCertEncoded. We can use this pointer
to determine the order of certificates when enumerating hCertStore using
CertEnumCertificatesInStore.
This change is to help ensure that the ordering of the certificate chain
requested by the user via CURLINFO_CERTINFO has the same ordering on all
versions of Windows.
Prior to this change Schannel certificate order was reversed in 8986df80
but that was later reverted in f540a39b when it was discovered that
Windows 11 22H2 does the reversal on its own.
Ref: https://github.com/curl/curl/issues/9706
Closes https://github.com/curl/curl/pull/11632
