Add more arguments to mpathconf (#1154347)

Setting find_multipaths to yes will keep multipath from creating a
multipath device unless one of the following conditions is met:

  - two non-blacklisted paths have the same wwid
  - a path has the same wwid as a previously created multipath device
  - the user forced the creation of a device

In other words, only create a multipath device if there is a device with
multiple paths. This would be helpful.