code: private static boolean isDefaultPort(String scheme, int port) {
  		if (port == -1) {
  			return true;
  		}
  
  		if ("http".equalsIgnoreCase(scheme)) {
  			return port == 80;
  		}
  
  		if ("https".equalsIgnoreCase(scheme)) {
  			return port == 443;
  		}
  
  		return false;
  	}
docs: Tells whether or not the given port is the default for the given scheme.
  <p>
  Only intended to be used with HTTP/S schemes.
  
  @param scheme the scheme.
  @param port the port.
  @return {@code true} if the given port is the default for the given scheme, {@code false} otherwise.