Use SIGQUIT instead of SIGINT

refs: #3870

Change-Id: I915d9422d56a441b351bb9ab38a0c8377e1da34f
diff --git a/bin/minindn b/bin/minindn
index ddcc95d..bf255df 100755
--- a/bin/minindn
+++ b/bin/minindn
@@ -479,7 +479,7 @@
     hosts_conf = []
     links_conf = []
 
-    signal.signal(signal.SIGINT, signal_handler)
+    signal.signal(signal.SIGQUIT, signal_handler)
 
     options = parse_args()