SPDX-License-Identifier: MIT and LGPL-2.1-or-later and Apache-2.0 and Zlib

The overall license of steam-runtime-tools and pressure-vessel is
LGPL-2.1-or-later <https://spdx.org/licenses/LGPL-2.1-or-later.html>,
which can be found in the file `LICENSES/LGPL-2.1-or-later.txt`:

    SPDX-License-Identifier: LGPL-2.1-or-later

    This program 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, see <http://www.gnu.org/licenses/>.

Some of the individual source files are under the more permissive
MIT/X11 or Zlib licenses, and can be extracted into proprietary projects
without needing to follow the terms of the LGPL. See `LICENSES/`
or the individual source files for details.

See individual source files for copyright and licensing details, and
in particular pressure-vessel/THIRD-PARTY.md for details of third-party
libraries used or included in pressure-vessel releases.

For supporting code that is marked as being under the
Apache license version 2.0, the full license text can be found in
`LICENSES/Apache-2.0.txt`.