Update to 6.5

* patches/patch-bin_cmew is merged to upstream.

Changelog:
Mew 6.5 stable release (2012/04/16)

Mew 6.5rc2 (2012/04/05)

* Checking libwrap for stunnel.
* Supporting stunnel 4.53.
TAKANO Yuji <takachan>
* Disabling libwrap.
ARAI Shun-ichi <hermes>

Mew 6.5rc1 (2012/03/28)

* Workaround of cmew for Ruby 1.9.
Tatsuya Kinoshita <tats>
* mew-make-temp-name allows non-ASCII characters
Yoshinari Nomura <nom>

Mew 6.4.50 (2012/03/07)

* Supporting stunnel 4.51.
Seiji Ariga <ariga>
* Hilighting HTML produced by w3m.
* Fixing regex of mew-regex-ignore-scan-body-list.
Tatsuya Kinoshita <tats>
* Fixing cmew bugs.

(ryoon)