Updated license to LPPL 1.3c and added SPDIX license identifier.

README.md

@@ -46,7 +46,7 @@ License
    This program can be redistributed and/or modified under the terms
    of the LaTeX Project Public License Distributed from CTAN
    archives in directory macros/latex/base/lppl.txt; either
-   version 1 of the License, or any later version.
+   version 1.3c of the License, or (at your opinion) any later version.
 
 You are allowed to distribute this file under the condition that it is
 distributed together with all the following files:

svninfo.dtx

@@ -16,9 +16,10 @@
 %%   This program can be redistributed and/or modified under the terms
 %%   of the LaTeX Project Public License Distributed from CTAN
 %%   archives in directory macros/latex/base/lppl.txt; either
-%%   version 1 of the License, or any later version.
-%%
+%%   version 1.3c of the License, or any later version.
 %%
+%%  SPDX-License-Identifier: LPPL-1.3c+
+%% 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 %
@@ -443,7 +444,7 @@
 % \noindent This program can be redistributed and/or modified under
 % the terms of the \LaTeX{} Project Public License Distributed from
 % CTAN archives in directory '\texttt{macros/latex/base/lppl.txt}';
-% either version 1 of the License, or any later version.
+% either version 1.3c of the License, or (at your opinion) any later version.
 %
 % \StopEventually{}
 %

svninfo.ins

@@ -34,8 +34,9 @@
 %%   This program can be redistributed and/or modified under the terms
 %%   of the LaTeX Project Public License Distributed from CTAN
 %%   archives in directory macros/latex/base/lppl.txt; either
-%%   version 1 of the License, or any later version.
+%%   version 1.3c of the License, or (at your opinion) any later version.
 %%
+%%   SPDX-License-Identifier: LPPL-1.3c+
 %%
 %% $Id: svninfo.ins 4705 2010-03-23 19:57:29Z brucker $
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%