Dear Developers,
I would like to display my website in-game in a MOTD with HTTPS protocol.
To do that please implement a better webbrowser engine in the game.
GoldSource uses Chromium Embedded Framework 1, which is no longer being developed or supported.
Updating to CEF3 to support HTTPS would require considerable changes and would likely require Windows XP support to be dropped from the game itself (currently only Steam has dropped support for the same reason, since it uses CEF3 for its UI).
I'm not sure if it's even possible to implement CEF3 due to its use of multi-process architecture.
Thank you for your answer. So it would be too much work to implement.
I'd leave that for @mikela-valve to decide.