From abook's website (http://abook.sourceforge.net/):
Abook is a text-based addressbook program designed to use with mutt mail
client. Abook runs on Linux, FreeBSD and some other UNIXes.
Probably not the world's most important package, but I can't be the only
mutt-user who missed it.
Signed-off-by: Adam Vandenberg <flangy@gmail.com>
