hard.txt

add separate 'default' colours for each panel
	index, pager, sidebar, compose, etc

split up/remove BE-specific code in ci_send_message()
colours/attrs
	parse config
	summary
	implement colour primitives
nntp refactor auto subscription (like imap)
config +=, -=, etc API
browser rewrite
Account-specific config
new help system, $help_format_string
sidebar A-aware
hcache/bcache -> maildir!
lua objects for Account, Mailbox, Email, etc
inline hcache, offline
change M->path from [] to *
	mailbox->[real]path -> ptr !array
eliminate AllMailboxes (dep on A-aware sidebar)
	start with fn  ML = get_mailboxes(FLAT|TREE);
	HIDDEN|VISIBLE

separate keybindings from curses & IMAP!

rewrite mutt_wstr_trunc()
	first, rename variables to be something sensible
	second, refactor to be legible

change large switch statements to [opcode, fn()] table
	pass(op, ctx, flags?) -> 100s functions

add timeout structs + callbacks for keymap.c
	eliminate imap dependencies
	on $imap_keepalive change alter timeout val