Add the ASL 2.0 license

Note that the entire package can still licensed under BSD.

python-dateutil.spec

@@ -2,11 +2,16 @@
 
 Name:           python-%{modname}
 Version:        2.8.1
-Release:        3%{?dist}
+Release:        4%{?dist}
 Epoch:          1
 Summary:        Powerful extensions to the standard datetime module
 
-License:        BSD
+# According to the LICENSE file:
+# - BSD License applies to all code, even that also covered by ASL 2.0
+# - ASL 2.0 applies to all contributions after 2017-12-01, as well as
+#   all contributions that have been re-licensed.
+License:        BSD or (BSD and ASL 2.0)
+
 URL:            https://github.com/dateutil/dateutil
 Source:         %{pypi_source}
 
@@ -73,6 +78,9 @@ make -C docs html
 %doc docs/_build/html
 
 %changelog
+* Wed Jun 02 2021 Petr Viktorin <pviktori@redhat.com> - 1:2.8.1-4
+- Add the ASL 2.0 license
+
 * Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 1:2.8.1-3
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild