Use SPDX license identifiers, update license

The schematron files are not Zlib licensed, but MIT (since 4.3.0):

5a444c238f

python-lxml.spec

@@ -1,13 +1,13 @@
 Name:           python-lxml
 Version:        4.7.1
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        XML processing library combining libxml2/libxslt with the ElementTree API
 
-# The lxml project is licensed under BSD
+# The lxml project is licensed under BSD-3-Clause
 # Some code is derived from ElementTree and cElementTree
-# thus using the MIT-like elementtree license
-# .xsl schematron files are under the MIT and zlib license
-License:        BSD and MIT and zlib
+# thus using the MIT-CMU elementtree license
+# .xsl schematron files are under the MIT license
+License:        BSD-3-Clause AND MIT-CMU AND MIT
 URL:            https://github.com/lxml/lxml
 Source0:        %{pypi_source lxml}
 
@@ -61,6 +61,10 @@ cp -a build/lib.%{python3_platform}-*/* src/
 %{python3_sitearch}/lxml-*.egg-info/
 
 %changelog
+* Wed Aug 31 2022 Miro Hrončok <mhroncok@redhat.com> - 4.7.1-6
+- Use SPDX license identifiers
+- The schematron files are not Zlib licensed, but MIT
+
 * Fri Jul 22 2022 Fedora Release Engineering <releng@fedoraproject.org> - 4.7.1-5
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild