backtrace: update copyright notice
Holger wrote that function and I made the logging version of it. The
header was copied during the separation of backtrace.c from gsm_utils.c
in the past, and of course gsm_utils.c had more people involved...
diff --git a/src/backtrace.c b/src/backtrace.c
index f0c3489..4ca7adb 100644
--- a/src/backtrace.c
+++ b/src/backtrace.c
@@ -1,8 +1,6 @@
/*
- * (C) 2008 by Daniel Willmann <daniel@totalueberwachung.de>
* (C) 2009 by Holger Hans Peter Freyther <zecke@selfish.org>
- * (C) 2009-2010 by Harald Welte <laforge@gnumonks.org>
- * (C) 2010 by Nico Golde <nico@ngolde.de>
+ * (C) 2012 by Harald Welte <laforge@gnumonks.org>
*
* All Rights Reserved
*