1.26 CURL_REFUSE_CLEARTEXT
1.27 hardcode the "localhost" addresses
1.28 FD_CLOEXEC
+ 1.29 Upgrade to websockets
2. libcurl - multi interface
2.1 More non-blocking
https://github.com/curl/curl/issues/2252
+1.29 Upgrade to websockets
+
+ libcurl could offer a smoother path to get to a websocket connection.
+ See https://github.com/curl/curl/issues/3523
+
+ Michael Kaufmann suggestion here:
+ https://curl.haxx.se/video/curlup-2017/2017-03-19_05_Michael_Kaufmann_Websocket_support_for_curl.mp4
+
2. libcurl - multi interface
2.1 More non-blocking