Add SPDX-License-Identifier headers

Add SPDX-License-Identifier headers to all substantial source files.
Collapse copyright years.  Add some Emacs configuration for files
where the copyright notice is at the end.  Add a test that every
file has SPDX-License-Identifier.

1 files changed, 3 insertions, 1 deletions

diff --git a/docs/notes b/docs/notes
index 5a7d3bc..c3e529a 100644
--- a/docs/notes
+++ b/docs/notes
@@ -229,10 +229,12 @@ Client Issues
 
 License
 
-    Copyright 2006, 2007, 2008, 2013
+    Copyright 2006-2008, 2013
         The Board of Trustees of the Leland Stanford Junior University
 
     Copying and distribution of this file, with or without modification,
     are permitted in any medium without royalty provided the copyright
     notice and this notice are preserved.  This file is offered as-is,
     without any warranty.
+
+    SPDX-License-Identifier: FSFAP