**** Insert this text in the curl_easy_getinfo description. ***

CURLINFO_LASTSOCKET

  Pass a pointer to a long to receive the last socket used by this curl session. If the socket is no longer valid, -1 is returned.

**** Insert this text in the curl_easy_setopt description in the PROTOCOL OPTIONS section. ***

CURLOPT_CONNECT_ONLY

  A non-zero parameter tells the library to perform any required proxy authentication and connection setup, but no data transfer.

  This option is useful with the CURLINFO_LASTSOCKET option to curl_easy_getinfo. The library can set up the connection and then the application can obtain the most recently used socket for special data transfers.
