CURL_HTTP_VERSION

type CURL_HTTP_VERSION = (

  CURL_HTTP_VERSION_NONE,

  CURL_HTTP_VERSION_1_0,

  CURL_HTTP_VERSION_1_1,

  CURL_HTTP_VERSION_2_0,

  CURL_HTTP_VERSION_2TLS,

  CURL_HTTP_VERSION_2_PRIOR_KNOWLEDGE,

  CURL_HTTP_VERSION_LAST

);