Implements the CurlReq.Request behaviour for a cURL command string
CurlReq.Request
Lists supported flags for the cURL command
@spec flags() :: [{atom(), atom() | nil}]
iex> flags = CurlReq.Curl.flags() iex> {:header, :H} in flags true iex> flags = CurlReq.Curl.flags() iex> {:compressed, nil} in flags true iex> flags = CurlReq.Curl.flags() iex> {:foo, nil} in flags false