Kauai Mayor Bernard Carvalho Jr. is considering lifting a ban on vacation rental units on the island's flood-damaged North Shore. The Honolulu Star-Advertiser reported on Sunday that the may be willing to overturn his executive order from May, which prohibited the operation of rental units on the North Shore, if owners agree to house some of the 15 families that lost their homes during severe flooding and landslides in mid-April. Carvalho is quoted as saying that a lift of the ban would be a "win-win."…