Merge pull request fluent#94 from panta/master

Gracefully close the socket.

Author: repeatedly

fluent/sender.py

@@ -197,6 +197,7 @@ def clear_last_error(self, _thread_id = None):
 
     def _close(self):
         if self.socket:
+            self.socket.shutdown(socket.SHUT_RDWR)
             self.socket.close()
         self.socket = None