SPDX-License-Identifier: GPL-2.0-or-later AND BSD-3-Clause

Copyright © 2020  Herbert Valerio Riedel <hvr@gnu.org>

    This library is free software: you may copy, redistribute and/or modify it
    under the terms of the GNU General Public License as published by the
    Free Software Foundation, either version 2 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
    General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program (see `LICENSE.GPLv2`).  If not, see
    <https://www.gnu.org/licenses/gpl-2.0.html>.

This library incorporates work covered by the following copyright and
permission notice:

    Copyright © 2012-2018 Operational Dynamics Consulting, Pty Ltd and Others
    All rights reserved.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:

        1. Redistributions of source code must retain the above copyright
           notice, this list of conditions and the following disclaimer.

        2. Redistributions in binary form must reproduce the above
           copyright notice, this list of conditions and the following
           disclaimer in the documentation and/or other materials provided
           with the distribution.

        3. Neither the name of the project nor the names of its contributors
           may be used to endorse or promote products derived from this
           software without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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