In 45417bc (Add configuration option to notify all appointments,
2011-07-31), we added an option that allows for choosing whether the
user receives notifications only for flagged or only for unflagged
appointments. Convert this setting into a three-state option and allow
the user to additionally enable notifications for *all* appointments.
Signed-off-by: Lukas Fleischer <lfleischer@calcurse.org>
ebe483c058