Log Message:
mutt: Update to version 2.0.0

Change since version 1.14.7:
+ Domain-literal support for email addresses, e.g user@[IPv6:fcXX:...]
! Buffy completion only occurs for the "change-folder" set of functions.
  It has been disabled for <attach-message>, <write-fcc>, the fcc
  mailbox prompt, and the autocrypt scan mailbox prompt.
! The "save/copy message to mailbox" set of functions use the \ 
"mailbox"
  history list, instead of the "filename" list.
! Message-ID extraction permits values missing angle brackets and '@'
  to allow properly threading the garbage sent by some providers.
  Mutt will add missing angle brackets when sending out replies, however.
! When adding multiple attachments, via <attach-file> in the compose menu,
  the browser menu can be exiting via <quit> after tagging the files.
  Previously, <select-entry> had to be used.
! ctrl-p/ctrl-n are by default bound to <history-up>/<history-down> \ 
in the
  editor menu.
+ The "cd" command allows changing the current working directory.
  As part of this, Mutt expands relative paths internally.  There
  may be a change to some "prettified" relative paths because of this.
! Some configuration variable default values are localizable by
  translators.  Currently these are: $attribution, $compose_format,
  $forward_attribution_intro, $forward_attribution_trailer, $status_format,
  $ts_icon_format, $ts_status_format.
+ Mutt will try to automatically reconnect to an IMAP mailbox on error,
  and will merge unsync'ed changes if possible.
! $crypt_protected_headers_subject defaults to "...", following the
  protected headers revised specification.
! Date, From, To, Cc, and Reply-To headers are stored as protected headers.
+ XOAUTH2 support.  Please see the manual, contrib script mutt_oauth2.py,
  and mutt_oauth.py.README for more details.
+ $tunnel_is_secure, default set, assumes a connection via $tunnel is
  encrypted.  Unsetting this will cause $ssl_starttls and $ssl_force_tls
  to be respected.
+ Patterns are tab-completable in the editor menu.
! $reply_to is consulted before $reply_self.
+ $copy_decode_weed, default unset, controls header weeding for <decode-copy>
  and <decode-save>.
+ $pipe_decode_weed, default set, enables header weeding for <pipe-message>.
+ $print_decode_weed, default set, enables header weeding for <print-message>.
! format=flowed attachments are space-unstuffed when viewed, saved,
  piped, and printed.
+ The "run" command will execute MuttLisp. $muttlisp_inline_eval, if \ 
set, will
  execute unquoted parenthesized command arguments as MuttLisp.  Please see
  the manual for more details about both.
+ $cursor_overlay, when set, will overlay the indicator, tree,
  sidebar_highlight, and sidebar_indicator colors onto the current line.
  "default" colors will be overridden and attributes will be merged.
! The message-id generation algorithm uses a random number instead of
  the step counter and PID.
! $ssl_force_tls defaults set.  (Trying this again for 2.0).
! $hostname is set *after* muttrc processing.  It can be manually set
  in the muttrc to avoid using DNS calls to obtain the FQDN.
+ $attach_save_dir specifies a directory to use when saving attachments.