Log Message:
neomutt: update to 20180323.

2018-03-23  Richard Russon  <rich@flatcap.org>
* Features
  - unify logging/messaging
  - add alert (blink) colors
* Contrib
  - Vim syntax for NeoMutt log files
* Bug Fixes
  - Fix progress bar range
  - notmuch: stop if db open fails
  - Improve index color cache flushing behavior
  - lua: fix crash when setting a string
* Translations
  - Update Czech translation (100%)
  - Update German translation (100%)
  - Update Polish translation (94%)
  - Update Portuguese (BR) translation (100%)
  - Update Spanish translation (64%)
  - Update Turkish translation (75%)
  - Merge simliar messages
* Docs
  - Clarify precedence of settings in config files
  - Fix subjectrx example in the manual
* Website
  - Update Gentoo distro page
  - Devel: Static analysis
* Build
  - Support —with-sysroot configure arg
  - Expose EXTRA_CFLAGS_FOR_BUILD and EXTRA_LDFLAGS_FOR_BUIlD
  - Update to latest autosetup
  - Make sure git_ver.h doesn't eat random 'g's out of tag names
* Code
  - Refactor to reduce complexity
  - Refactor to reduce variables' scope
  - Sort functions/config to make docs more legible