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, 9 insertions, 3 deletions

diff --git a/server/keytab-backend.in b/server/keytab-backend.in
index a029e6c..6a7870a 100644
--- a/server/keytab-backend.in
+++ b/server/keytab-backend.in
@@ -152,7 +152,7 @@ __END__
 =for stopwords
 keytab-backend keytabs KDC keytab kadmin.local -norandkey ktadd remctld
 auth Allbery rekeying MERCHANTABILITY NONINFRINGEMENT sublicense
-kadmin.local.
+kadmin.local. SPDX-License-Identifier MIT
 
 =head1 NAME
 
@@ -215,8 +215,8 @@ Russ Allbery <eagle@eyrie.org>
 
 =head1 COPYRIGHT AND LICENSE
 
-Copyright 2006, 2007, 2008, 2010, 2013 The Board of Trustees of the Leland
-Stanford Junior University
+Copyright 2006-2008, 2010, 2013 The Board of Trustees of the Leland Stanford
+Junior University
 
 Permission is hereby granted, free of charge, to any person obtaining a
 copy of this software and associated documentation files (the "Software"),
@@ -236,6 +236,8 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 DEALINGS IN THE SOFTWARE.
 
+SPDX-License-Identifier: MIT
+
 =head1 SEE ALSO
 
 kadmin.local(8), remctld(8)
@@ -244,3 +246,7 @@ This program is part of the wallet system.  The current version is
 available from L<https://www.eyrie.org/~eagle/software/wallet/>.
 
 =cut
+
+# Local Variables:
+# copyright-at-end-flag: t
+# End: