[Fedora-legal-list] LGPL-ish license in Package Review for sfexp

When verifying the license for sfsexp ( https://bugzilla.redhat.com/show_bug.cgi?id=2095717) in my review, I noticed it appears to have a modification to the LGPLv2+ license on it. The full license text provided by the package is: Copyright (2003-2006). The Regents of the University of California. This material was produced under U.S. Government contract W-7405-ENG-36 for Los Alamos National Laboratory, which is operated by the University of California for the U.S. Department of Energy. The U.S. Government has rights to use, reproduce, and distribute this software. NEITHER THE GOVERNMENT NOR THE UNIVERSITY MAKES ANY WARRANTY, EXPRESS OR IMPLIED, OR ASSUMES ANY LIABILITY FOR THE USE OF THIS SOFTWARE. If software is modified to produce derivative works, such modified software should be clearly marked, so as not to confuse it with the version available from LANL. Additionally, this library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, U SA LA-CC-04-094 (taken from https://github.com/mjsottile/sfsexp/blob/master/COPYING). This to me reads as a modification to the normal LGPL (since it puts requirements that derivative works be clearly marked as distinct). Is this modification acceptable for inclusion in Fedora? -Ian