Fix data race in WebSocket where _url is accessed without protection in setThreadName

Also fix with url usage + docker container uses fedora and works with tsan

ixwebsocket/IXWebSocket.cpp

@@ -262,7 +262,7 @@ namespace ix
 
     void WebSocket::run()
     {
-        setThreadName(_url);
+        setThreadName(getUrl());
 
         while (true)
         {