Hi. I have found something
this VST plugin can stream from your VST host to Icecast. Sadly, it does not work on Cubase 64 bit because the plugin is x32 and the VST bridge is not very good.
https://github.com/gargaj/shoutvst
I have tried using BUTT.
Firstly, after you install Icecast, you write in start menu Icecast and click Run Icecast (console). It will open a console window, telling that the server is runing. You can only configure Icecast from a txt file, Icecast Config. From there you copy the infos to BUTT or shoutvst, if it really works.
This guy explains how to configure BUTT
Now, after I press the play button in BUTT, it says that the username and password is wrong, altough I copied the same one as in Icecast Config.txt. I guess I need to change the default password...and see...