implement curl multi options through http\Client::configure()

implement curl multi options through http\Client::configure()

- add http\Client::configure()
  * options:
    * bool(use_eventloop)
    * bool(pipelining)
    * int(maxconnects)
    * int(max_total_connections)
    * int(max_host_connections)
    * int(max_pipeling_length)
    * int(chunk_length_penalty_size)
    * int(content_length_penalty_size)
    * array(pipelining_site_bl)
    * array(pipelining_server_bl)
- deprecate http\Client::enablePipelining()
- deprecate http\Client::enableEvents()