Note recent changes
Add "allow_vulnerable_openssl" configuration item.
Check for vulnerable OpenSSL versions
Allow vulnerable OpenSSL for testing purposes
Remove ruby-lib-dir and ruby-include-dir, these should be specified by RbConfig - Closes #580
Revert "Patch for OpenSSL insanity"

This reverts commit 30a1e7c5e10743bd9753285d91eff6f0af8e09ca.
If we fail during tls handshake, don't send an EAP-Fail msg

Because tls_handshake_recv() says there's something wrong with
the TLS session.  Therefore, we can't use it for anything
Check for invalid TLS handshake

If the system has a vulnerable version of OpenSSL, and the
admin has told us to allow it, we want to catch and stop
the problem.