Support now added for Undertow through our R20 Bridge:
See this thread:
We already added support for Michael Welters plugins.
Which PointMirror plugin were you referring to?
If plugin developers contact us we can extend support, this is a snowball effect, the more plugins that get tested and support added the more other plugins may then work. Once we have enough plugins tested and working we can release the latest R20 Bridge to everyone.