- Update to neomutt 20170609 which updates to mutt 1.8.3
+ Warn on bindkey aliasing
+ Drop PATCHES, tidy 'mutt -v' output
+ Add %z format strings to index_format
+ Add debug_level/debug_file options
+ Fix nntp group selection
+ Fix status color
+ Tidy up S/MIME contrib
+ Do not try to create Maildir if it is an NNTP URI
+ Fix missing NONULL for mutt.set() in Lua
+ Fix German PGP shortkeys
+ Remove feature muttrc files
+ Merge README.notmuch into manual
+ Remove unneded scripts
+ Remove README.SECURITY
+ Remove BEWARE and devel-notes.txt
+ Update Makefiles
+ Delete TODO files
+ Remove legacy files
+ Don't generate vim-neomutt syntax file
+ Remove LaTeX/pdf manual generation
+ Add missing docs for expandos
+ Fix sidebar howto examples
+ Remove some upstream references
+ Drop refs to patches
+ Improve PR template and CONTRIBUTING.md
+ Fix list items in newbie-tutorial's Mailing List Guidelines
+ Remove configure options that no longer exist
+ fix newbie tutorial
+ document signing tags / releases