In construing and applying this title, the following shall not be deemed prior liens or encumbrances: easements; rights-of-way; joint driveways; party wall agreements; current taxes and assessments not delinquent; restrictions as to building, use and occupancy unless there is a right of reentry or forfeiture for violation; instruments reserving mineral, oil, or timber rights; title matters for which the insurer is insured against loss by a title insurer; and leases under which rents are reserved to the owner of the real estate.