Remove unnecessary instantiation of HttpResponseStatus

Motivation:
- In the `HttpResponseStatus#equals` checks only status code. No need to create new instance of `HttpResponseStatus` for comparison with response status.
- The RFC says: `the HTTP version and reason phrase aren't important` [1].

Modifications:
Use comparison by status code without creating new `HttpResponseStatus`.

Result:
Less allocations, more clear code.

[1] https://tools.ietf.org/html/draft-ietf-hybi-thewebsocketprotocol-00

codec-http/src/main/java/io/netty/handler/codec/http/websocketx/WebSocketClientHandshaker00.java

@@ -24,7 +24,6 @@ import io.netty.handler.codec.http.HttpHeaderNames;
 import io.netty.handler.codec.http.HttpHeaderValues;
 import io.netty.handler.codec.http.HttpHeaders;
 import io.netty.handler.codec.http.HttpMethod;
-import io.netty.handler.codec.http.HttpResponseStatus;
 import io.netty.handler.codec.http.HttpVersion;
 import io.netty.util.AsciiString;
 
@@ -178,9 +177,7 @@ public class WebSocketClientHandshaker00 extends WebSocketClientHandshaker {
      */
     @Override
     protected void verify(FullHttpResponse response) {
-        final HttpResponseStatus status = new HttpResponseStatus(101, "WebSocket Protocol Handshake");
-
-        if (!response.status().equals(status)) {
+        if (response.status().code() != 101) {
             throw new WebSocketHandshakeException("Invalid handshake response getStatus: " + response.status());
         }