Is there a reason to keep this part in resolv.conf(5) about an option doing nothing?
> options inet6 > Enables support for IPv6-only applications, by setting RES_USE_INET6 > in _res.options (see res_init(3)). On OpenBSD this option does > nothing. If we can remove it, here is the diff. Index: resolv.conf.5 =================================================================== RCS file: /home/cvs/src/share/man/man5/resolv.conf.5,v retrieving revision 1.59 diff -u -p -r1.59 resolv.conf.5 --- resolv.conf.5 24 Jan 2020 06:16:47 -0000 1.59 +++ resolv.conf.5 23 Apr 2020 15:09:42 -0000 @@ -258,13 +258,6 @@ particularly if there is a reduced MTU, as is often the case with .Xr pppoe 4 or with tunnels. -.It Cm inet6 -Enables support for IPv6-only applications, by setting RES_USE_INET6 in -_res.options (see -.Xr res_init 3 ) . -On -.Ox -this option does nothing. .It Cm insecure1 Do not require IP source address on the reply packet to be equal to the server's address.
