TLS: make SSL_VERIFYSTATUS work again

The CURLOPT_SSL_VERIFYSTATUS option was not properly handled by libcurl
and thus even if the status couldn't be verified, the connection would
be allowed and the user would not be told about the failed verification.

Regression since cb4e2be7

CVE-2017-2629
Bug: https://curl.haxx.se/docs/adv_20170222.html

Reported-by: Marcus Hoffmann