Log Message:
Updated neomutt to 20160910.

2016-09-10  Richard Russon  <rich@flatcap.org>
* New Features
  - Colouring Attachments with Regexp
    Guillaume Brogi
  - PGP Encrypt to Self
    Guillaume Brogi
  - Sensible Browser
    Pierre-Elliott Bécue
  - Reply using X-Original-To: header
    Pierre-Elliott Bécue
  - Purge Thread
    Darshit Shah
  - Forgotten attachment
    Darshit Shah
  - Add sidebar_ordinary color
* Bug Fixes
  - align the nntp code with mutt
    Fabian Groffen
  - check for new mail while in pager when idle
    Stefan Assmann
  - Allow the user to interrupt slow IO operations
    Antonio Radici
  - keywords: check there are emails to tag
  - fix duplicate saved messages
  - flatten contrib/keybase dir to fix install
  - restore the pager keymapping 'i' to exit
  - proposed fix for clearing labels
  - notmuch: sync vfolder_format to folder_format
* Docs
  - Update List of Features and Authors
* Build
  - fix configure check for fmemopen
  - use fixed version strings
* Upstream
  - Increase date buffer size for $folder_format.
  - Disable ~X when message scoring.
  - Fix pgpring reporting of DSA and Elgamal key lengths.
  - Stub out getdnsdomainname() unless HAVE_GETADDRINFO.
  - Autoconf: always check for getaddrinfo().
  - Add missing sidebar contrib sample files to dist tarball.