Mew 6.8 (2018/06/07)

* Using "gpg" for GnuPG 2 (GnuPG 2.1.23 or later).
* Enable GB 18030 character set decoding.
  Add entry to mew-cs-database-for-decoding.
	Thomas Danckaert <thomas.danckaert>
* Don't specify obsolete sslVersion
	Tatsuya Kinoshita <tats>
* Supporting stunnel 5.45
	Tatsuya Kinoshita <tats>
* Hiding anti-spam fields.
* mewl.c: Expand MAX_HEADER size to 64k
	Yoshiaki Kasahara <ykasap>
* IMAP to support Gmail extension
	Yoshinari Nomura <nom>
* Change the default program to open office documents on Unix
  from "ooffice" to "soffice".
* Add debug forms
	Michael Ernst <mernst>
* Support GnuPG 2.1.14 and 1.4.21 for old PGP
	Tatsuya Kinoshita <tats>
* Supporting GnuPG 2.
* Confirm to mkdir on mew-summary-save with nonexistent directory
	Yoshinari Nomura <nom>
* Rearrange lines to make files more consistent.
	Michael Ernst <mernst>
* Add instructions for using Emacs's built-in HTML renderer as well as w3m
	Michael Ernst <mernst>
* Update documents for stunnel 5
	Tatsuya Kinoshita <tats>
* Do not fail when MIME-Version is empty on decoding
	Tatsuya Kinoshita <tats>
* Add documentation string for mew-subject-simplify-ml
	Michael Ernst <mernst>
* How to set mew-prog-ssl-arg for stunnel v5
	Michael Ernst <mernst>
* Update mailing list URLs
	Michael Ernst <mernst>
