doxygen: adjust copyright to include 2017

Change-Id: If7c09a676f67da15454aedcda99d0e9b301c9945
diff --git a/src/application.c b/src/application.c
index aec3fd7..ee22639 100644
--- a/src/application.c
+++ b/src/application.c
@@ -43,7 +43,7 @@
  * a multi-threaded context, you have to add your own locking.
  *
  * \section sec_copyright Copyright and License
- * Copyright © 2008-2016 - Harald Welte, Holger Freyther and contributors\n
+ * Copyright © 2008-2017 - Harald Welte, Holger Freyther and contributors\n
  * All rights reserved. \n\n
  * The source code of libosmocore is licensed under the terms of the GNU
  * General Public License as published by the Free Software Foundation;