curl_easy_reset(3) on macOS

The text 06e31f79f9b5, as macOS 10.12.5, macOS 10.12.4, macOS 10.12.3, macOS 10.12.2, macOS 10.12.1, macOS 10.12 shipped it.

reset all options of a libcurl session handle

curl_easy_reset(3) on macOS now