Monocle gone?

[Christian]

Hi all,
I just updated from 1.8.20-b17 to b21 and there is no monocle platform 
anymore.
Will it come back?
Is there any other way to have a headless build?

I was trying around with xvfb as an alternative but sadly:
ES2 Prism: Error - GLX extension is not supported
     GLX version 1.3 or higher is required
Additionally xvfb segfaults...

However I would be awesome if Monocle would be back.
I have a lot of tests for the UI and since I cannot mock JavaFX classes 
because they are final I have to run a real application.

Thanks,
Christian