Stop auth at SIGTERM.

ccnode/node.py

@@ -124,6 +124,9 @@ class AuthHandler(object):
     def start(self):
         self.watcher.start()
 
+    def stop(self):
+        self.watcher.stop()
+
 
 class MainLoop(object):
     def __init__(self, config_path):
@@ -266,6 +269,7 @@ class MainLoop(object):
 
     def stop(self, watcher=None, revents=None):
         logger.info('Exiting node...')
+        self.auth.stop()
         # close rpc
         if self.rpc_con is not None:
             self.rpc_con.shutdown()