moderated frightening statement in NEWS

NEWS

@@ -10,8 +10,10 @@ Main changes between cado-nfs-1.1 and cado-nfs-2.0:
   currently not supported
 * new cadofactor.py script written in Python, allows larger-scale distribution
   with client/server model
-* files used/generated by cado-nfs-1.1 are not compatible with cado-nfs-2.0,
-  and binaries use different command-line options
+* files used/generated by cado-nfs-1.1 are not entirely compatible with
+  cado-nfs-2.0. Relations files are compatible, but for pretty much
+  everything else, it is preferrable to start afresh. Likewise,
+  command-line options of several binaries have changed.
 * implementations of NFS-DL and NFS-FFS (experimental, requires some
   background knowledge to use)