>>> check dnslists = +defer_unknown : test.again.dns
>>> DNS list check: +defer_unknown
>>> DNS list check: test.again.dns
>>> new DNS lookup for 1.0.0.V4NET.test.again.dns
>>> 1.0.0.V4NET.test.again.dns in dns_again_means_nonexist? no (option unset)
LOG: DNS list lookup defer (probably timeout) for 1.0.0.V4NET.test.again.dns: returned DEFER
>>> check dnslists = +defer_unknown : test.again.dns
>>> DNS list check: +defer_unknown
>>> DNS list check: test.again.dns
>>> new DNS lookup for 1.0.0.V4NET.test.again.dns
>>> 1.0.0.V4NET.test.again.dns in dns_again_means_nonexist? no (option unset)
LOG: DNS list lookup defer (probably timeout) for 1.0.0.V4NET.test.again.dns: returned DEFER