licensing concerns of code by FUJITSU LIMITED under the JDA for the CDE/Motif PST
I'm currently going through Xorg related packages in Nixpkgs adding licensing information.
What is the licensing for the relevant code parts of the files that the following copyright applies to?:
(c) Copyright 1995 FUJITSU LIMITED
This is source code modified by FUJITSU LIMITED under the Joint
Development Agreement for the CDE/Motif PST.
All the files also contain other copyright notices with their respective licenses, but that specific copyright notice does not include any license which raises the concern that the relevant code is proprietary.