1.0.1   2015-11-10
	* use direct TLS and port 853 by default
	* TCP with STARTTLS as option

1.0     2015-05-28
	* completely rewrite the code with libevent
	* support TCP, direct TLS and STARTTLS upstream
	* handle connection timeout by server

0.1     2014-04-02
	* first release
