property :private_network, [TrueClass, FalseClass]
property :protect_system, [TrueClass, FalseClass, String]
property :protect_home, [TrueClass, FalseClass, String]
+property :restrict_address_families, [String, Array]
property :no_new_privileges, [TrueClass, FalseClass]
property :timeout_sec, Integer
property :pid_file, String