bin/57769: mdnsd(8) does not start if the kernel is built without IPv6

[thorpej%me.com@localhost]

>Number:         57769
>Category:       bin
>Synopsis:       mdnsd(8) does not start if the kernel is built without IPv6
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Dec 13 05:45:00 +0000 2023
>Originator:     Jason Thorpe
>Release:        10.0_RC1
>Organization:
CISCy Business
>Environment:
NetBSD sun3-160 10.0_RC1 NetBSD 10.0_RC1 (GENERIC) #0: Wed Nov 29 12:36:24 UTC 2023  mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/sun3/compile/GENERIC sun3
>Description:
sun3-160# mdnsd -debug
socket AF_INET6: Address family not supported by protocol family
sun3-160# 

>How-To-Repeat:
See above.
>Fix:
Not provided.