Log Message:
neomutt: update to 20201120.

2020-11-20  Richard Russon  <rich@flatcap.org>
* Security
  - imap: close connection on all failures
* Features
  - alias: add <limit> function to Alias/Query dialogs
  - config: add validators for {imap,smtp,pop}_authenticators
  - config: warn when signature file is missing or not readable
  - smtp: support for native SMTP LOGIN auth mech
  - notmuch: show originating folder in index
* Bug Fixes
  - sidebar: prevent the divider colour bleeding out
  - sidebar: fix <sidebar-{next,prev}-new>
  - notmuch: fix <entire-thread> query for current email
  - restore shutdown-hook functionality
  - crash in reply-to
  - user-after-free in folder-hook
  - fix some leaks
  - fix application of limits to modified mailboxes
  - write Date header when postponing
* Translations
  - 100% Lithuanian
  - 100% Czech
  - 70% Turkish
* Docs
  - Document that $sort_alias affects the query menu
* Build
  - improve ASAN flags
  - add SASL and S/MIME to --everything
  - fix contrib (un)install
* Code
  - my_hdr compose screen notifications
  - add contracts to the MXAPI
  - maildir refactoring
  - further reduce the use of global variables
* Upstream
  - Add $count_alternatives to count attachments inside alternatives