lua to https

We tried to use lua to make https calls according to this tutorial:
http://notebook.kulchenko.com/programming/https-ssl-calls-with-lua-and-…

We have instlled lua 5.2, lua socket and lua sec

But we encountered a problem similar to the one this guy encountered

http://stackoverflow.com/questions/8286677/https-request-in-lua

we tried those wothout success
local r, c, h, s = https.request{

local https = require 'ssl.https'

Also

Minetest server commands