reversing logic to check for chunked mode

Author: kai-ion

src/aws-cpp-sdk-core/source/client/ClientConfiguration.cpp

@@ -220,10 +220,7 @@ void setLegacyClientConfigurationParameters(ClientConfiguration& clientConfig)
     clientConfig.writeRateLimiter = nullptr;
     clientConfig.readRateLimiter = nullptr;
     clientConfig.httpLibOverride = Aws::Http::TransferLibType::DEFAULT_CLIENT;
-
-    // Users can explicitly set CLIENT_IMPLEMENTATION if their custom client handles chunking
-    clientConfig.httpClientChunkedMode = HttpClientChunkedMode::DEFAULT;
-    
+    clientConfig.httpClientChunkedMode = HttpClientChunkedMode::CLIENT_IMPLEMENTATION;
     clientConfig.followRedirects = FollowRedirectsPolicy::DEFAULT;
     clientConfig.disableExpectHeader = false;
     clientConfig.enableClockSkewAdjustment = true;