kresd/modeについて、ここに記述してください。

.. function:: mode('strict' | 'normal' | 'permissive')

   :return: Change resolver strictness checking level.

   By default, resolver runs in *normal* mode. There are possibly many small adjustments
   hidden behind the mode settings, but the main idea is that in *permissive* mode, the resolver
   tries to resolve a name with as few lookups as possible, while in *strict* mode it spends much
   more effort resolving and checking referral path. However, if majority of the traffic is covered
   by DNSSEC, some of the strict checking actions are counter-productive.

/normal /strict