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, 27 insertions, 2 deletions

diff --git a/contrib/ad-keytab b/contrib/ad-keytab
index 836cda5..badcb8d 100755
--- a/contrib/ad-keytab
+++ b/contrib/ad-keytab
@@ -5,7 +5,7 @@
 # Written by Bill MacAllister <whm@dropbox.com>
 # Copyright 2016 Dropbox, Inc.
 #
-# See LICENSE for licensing terms.
+# SPDX-License-Identifier: MIT
 
 ##############################################################################
 # Declarations
@@ -537,7 +537,8 @@ exit;
 __END__
 
 =for stopwords
-KDC LDAP MacAllister keytab keytabs msktutil ldapsearch
+KDC LDAP MacAllister keytab keytabs msktutil ldapsearch MERCHANTABILITY
+NONINFRINGEMENT sublicense SPDX-License-Identifier MIT
 
 =head1 NAME
 
@@ -664,4 +665,28 @@ perldoc Wallet::Config.
 
 Bill MacAllister <whm@dropbox.com>
 
+=head1 COPYRIGHT AND LICENSE
+
+Copyright 2016 Dropbox, Inc.
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of this software and associated documentation files (the "Software"),
+to deal in the Software without restriction, including without limitation
+the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+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
+
 =cut