The demise of echo.websocket.org broke the winhttp tests

[Francois Gouget]

I mentioned this a few times before on IRC and in a bug report but 
apparently I had not yet reported it to the mailing list.

echo.websocket.org has been offline for over a month and I have seen no 
sign that it would ever come back. The end result is that 
winhttp:winhttp and winhttp:notification now fail systematically.

So I really need someone to figure out how to replace it.

https://bugs.winehq.org//show_bug.cgi?id=51631

http://winetest.dolphin/data/patterns.html#winhttp:winhttp
https://test.winehq.org/data/patterns.html#winhttp:notification