Make the constructor explicit
Make the constructor explicit

Change-Id: I6dcd225de9fee909c4cd1afa70938c2eb7ff819a
Reviewed-by: Kurt Pattyn <da83d6ada5df79ff647b4271d0d788c6f1bafca2@gmail.com>

remimixlr/QtWebsocket,pixty/qtwebsockets,SfietKonstantin/qtwebsockets,pixty/qtwebsockets