[PATCH 0 of 3] mutt_buffy fixes
These three patches fix and clean up mutt_buffy.
The first patch fixes the call to mutt_expand_path() to use the string
length passed into the function instead of assuming _POSIX_PATH_MAX.
The second patch fixes http://dev.mutt.org/trac/ticket/3208 (imap and
mutt does not display new message count) and
http://dev.mutt.org/trac/ticket/3218 (<space> doesn't cycle through
mailboxes).
The third patch rewrites mutt_buffy to be readable and maintainable.
The sum total is the same as what I have posted at
http://dev.mutt.org/trac/attachment/ticket/3218/fix-3218.patch