SSLEngineFactory NPE, close AsyncHttpClient#839

Author: slandelle

api/src/main/java/org/asynchttpclient/util/SslUtils.java

@@ -69,7 +69,7 @@ public static SslUtils getInstance() {
     public SSLContext getSSLContext(AsyncHttpClientConfig config) throws GeneralSecurityException {
         SSLContext sslContext = config.getSSLContext();
 
-        if (sslContext != null) {
+        if (sslContext == null) {
             sslContext = config.isAcceptAnyCertificate() ? looseTrustManagerSSLContext : SSLContext.getDefault();
             if (config.getSslSessionCacheSize() != null)
                 sslContext.getClientSessionContext().setSessionCacheSize(config.getSslSessionCacheSize());