class OAuthClient

def initialize(*arg)

Method signature is as same as HTTPClient. See HTTPClient.new

addition to HTTPClient.
Creates a OAuthClient instance which provides OAuth related methods in 
def initialize(*arg)
  super
  @oauth_config = HTTPClient::OAuth::Config.new
  self.www_auth.oauth.set_config(nil, @oauth_config)
  self.www_auth.oauth.challenge(nil)
end