Provides the {@link java.net.URLStreamHandler URLStreamHandler} for the http scheme. This is not meant to be used directly, but instead is intended for use by {@link java.net.URL java.net.URL}. When you set the java system property java.protocol.handler.pkgs to "HTTPClient", java.net.URL will look for and use this stream handler to create and return a URLConnection instance whenever openConnection is invoked on a URL with the "http" scheme.