Test failures with OpenSSL 1.0.x

[Branko Čibej <br...@apache.org>]

You may have noticed that we sometimes get a test failure from this test:

    test_ssl_missing_client_certificate

When that happens, the returned error is SERF_ERROR_ISSUE_IN_TESTSUITE.

I've been trying to track this down for a while now. It happens on both
Linux and macOS, but only with OpenSSL 1.0.x; I've never seen that
failure with OpenSSL 1.1.x.

From all I've seen in a myriad debugging sessions, it appears that
there's a memory corruption bug within OpenSSL itself. Can anyone please
try to confirm that?

I have not seen this test failure on Windows, but I also haven't tested
on that platform very often.

-- Brane