When retrying authentication after a password change of an expired
password, use the new password instead of the original one. Also,
pass in the correct length for the new password buffer to
change_password and zero the buffer that holds the new password on
function exit.
Signed-off-by: Russ Allbery <rra@stanford.edu>
Signed-off-by: Nicolas Williams <nico@cryptonector.com>