Add SSL_get_client_certificate_types.

Exposes the certificate_types parameter in a CertificateRequest.

BUG=165446

Review URL: https://codereview.chromium.org/254723002

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/openssl@269864 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
7 files changed