This new setting for 'find_multipaths' tries to prevent things like
LVM from going ahead and activating LVM on the individual disks/paths
until there is reasonable certainty (via a timeout) that the device
is not a component of a multipath set.
NOTE: 'smart' is supported by device-mapper-multipath v0.7.7 and later.
Resolves: rhbz#1763906
Signed-off-by: Brian C. Lane <bcl@redhat.com>