In the cyphesis source code, it appears that all of the source files either have a 'GPL version 2 or later' clause, or no such license clause at all. The exception is server/protocol_instructions.h, which does not include the phrase "or later".
It would be a good idea to make this file consistent with all of the others so that the per-file licenses are consistent.
(I know this is rather picky, but Fedora is undergoing a rather large license audit, and we are trying to clear up minor inconsistencies such as this)
I have removed this file from the build in cvs. I am not sure exactly when new release will be available as there is not much in the way of new features or bug fixes in the current code.