convert license to SPDX

This is part of https://fedoraproject.org/wiki/Changes/SPDX_Licenses_Phase_4

openpgm.spec

@@ -4,11 +4,12 @@ Version:       5.2.122
 %global version_main      5.2
 %global version_dash_main 5-2
 %global version_dash      %{version_dash_main}-122
-Release:       35%{?dist}
+Release:       36%{?dist}
 Summary:       An implementation of the PGM reliable multicast protocol
 
 # The license is LGPLv2.1
-License:       LGPLv2
+# Automatically converted from old format: LGPLv2 - review is highly recommended.
+License:       LicenseRef-Callaway-LGPLv2
 # New URL is https://github.com/steve-o/openpgm
 # The files are now on https://code.google.com/archive/p/openpgm/downloads
 URL:           https://github.com/steve-o/%{name}
@@ -95,6 +96,9 @@ mv -f %{buildroot}%{_includedir}/%{name_alias}-%{version_main}/%{name_alias} %{b
 
 
 %changelog
+* Mon Sep  2 2024 Miroslav Suchý <msuchy@redhat.com> - 5.2.122-36
+- convert license to SPDX
+
 * Thu Jul 18 2024 Fedora Release Engineering <releng@fedoraproject.org> - 5.2.122-35
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild