Hi users,

I'm not sure when it started, but I recently noticed that name resolution
stopped working on RELEASE if the DNS IP address is in IPv6
```
$ drill  @2001:4860:4860::8888 aaaa leaf.dragonflybsd.org | egrep -v
'^(\;|$)'
Error: error sending query: Could not send or receive, because of network
error
```
unless using TCP query:
```
$ drill -t @2001:4860:4860::8888 aaaa leaf.dragonflybsd.org | egrep -v
'^(\;|$)'
leaf.dragonflybsd.org. 3599 IN AAAA 2001:470:1:43b:1::68
```
Similar DNS queries on other boxes running different OSes don't have the
same problem, and tcpdump output shows the response from the DNS server, so
I doubt it's an network issue.

$ uname -a
DragonFly c60 6.0-RELEASE DragonFly v6.0.0.33.gc7b638-RELEASE #0: Wed Aug 4
20:25:25 JST 2021 root@c60:/usr/obj/build/usr/src/sys/X86_64_GENERIC x86_64

Cheers.

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