HTTPCLIENT-2355: Reset protocol version in the execution context upon 200 response to CONNECT request

Author: ok2c

httpclient5/src/main/java/org/apache/hc/client5/http/impl/async/AsyncConnectExec.java

@@ -464,6 +464,7 @@ public void consumeResponse(final HttpResponse response,
                         state.tunnelRefused = true;
                         entityConsumerRef.set(asyncExecCallback.handleResponse(response, entityDetails));
                     } else if (status == HttpStatus.SC_OK) {
+                        clientContext.setProtocolVersion(null);
                         asyncExecCallback.completed();
                     } else {
                         throw new HttpException("Unexpected response to CONNECT request: " + new StatusLine(response));

httpclient5/src/main/java/org/apache/hc/client5/http/impl/classic/ConnectExec.java

@@ -286,7 +286,9 @@ private ClassicHttpResponse createTunnelToTarget(
         }
 
         final int status = response.getCode();
-        if (status != HttpStatus.SC_OK) {
+        if (status == HttpStatus.SC_OK) {
+            context.setProtocolVersion(null);
+        } else {
             final HttpEntity entity = response.getEntity();
             if (entity != null) {
                 response.setEntity(new ByteArrayEntity(