When strict SCT fails record verification failure

Since with SSL_VERIFY_NONE, the connection may continue and the
session may even be cached, we should save some evidence that the
chain was not sufficiently verified and would have been rejected
with SSL_VERIFY_PEER.  To that end when a CT callback returs failure
we set the verify result to X509_V_ERR_NO_VALID_SCTS.

Note: We only run the CT callback in the first place if the verify
result is still X509_V_OK prior to start of the callback.

RT #4502

Reviewed-by: Tim Hudson <tjh@openssl.org>