Shareaza

In my GWebCache I already support UTF-8 chars in both path and domain.
UTF-8 domains are tested through IDNA encoding, but they are served to clients in the original UTF-8 form.
I also support https for the GWebCache itself being used through https and the list of alternative GWebCaches can include https urls.

Does Shareaza support it?

Test it, Shareaza uses WinInet API so it is possible.