Package: x2gothinclient-displaymanager
FreeRDP2 uses a different file format and name for known_hosts: known_hosts2. Also the path where this file is to be expected has changed compared to FreeRDP v1 (.freerdp/known_hosts -> .config/freerdp/known_hosts2).
The initialization of the x2gothinclient's user dir should honour/support this.
I have a patch at hand and will provide it soonish...
Mike
-- Sent from my Fairphone 2 (running Sailfish OS)