SSL connections with required client auth throw bad_certificate errors.

[joshgontijo]

From #120

I'm trying to make Unirest calls to internal servers that require client auth but I keep getting bad_certificate errors. I've checked everything about the client certs I'm using and they all check out. I've tried making openssl and curl calls with the same certs and they connect to the server via ssl just fine. I spent days troubleshooting the certificate to no avail. Then I finally decided to try making a simple URLConnection with the same certs and it worked fine. Is there a bug in Unirest that doesn't allow for SSL connections that require client auth?

// Set all ssl properties
System.setProperty("javax.net.ssl.keyStore", "/path/to/keystore");
System.setProperty("javax.net.ssl.keyStorePassword", "keystorePass");
System.setProperty("javax.net.ssl.trustStore", "/path/to/trustStore");
System.setProperty("javax.net.ssl.trustStorePassword", "truststorePass");

String uri = "https://server.net/REST/endpoint";
URL url = new URL(uri);

// This works fine
URLConnection con = url.openConnection();

// This does not work and throws bad_certificate errors
HttpResponse<JsonNode> jsonResp = Unirest.get(uri).asJson();