Make Discourse play nice on Windows XP while using letsencrypt.org

@sam: thanks, I wanted to know if there is a way of doing this before I spend any money on it.

@Mittineague: that’s the official statement. The reality kind of beat that; stats usually shows twice as many users compared to Win10 and around the same compared to Win8 (~10% for WinXP, ~4% for Win10 and ~12% for Win8).