This allows you to use mDNSrepsonder to cache dns lookups (unicast) in addition to the existing mdns module for multicast. It only supports IPv4 resolvers though. It falls back to normal lookups if it doesn't work for some reason.
This is an alternative to running a local unbound. If you already have mDNSresponder running, this might make sense on an IPv4 network.
Right now this is only in current
https://github.com/MidnightBSD/src/pull/583
Source: r/MidnightBSDOS · by /u/laffer1