Hello, please disregard this request. I spoke too soon, apparently there's still no support for binding the RPC server to an IPv6 address in 2.94. I will update this package soon.

On Tue, Oct 2, 2018 at 10:20 AM <notify@aur.archlinux.org> wrote:
pemb [1] filed a deletion request for transmission-cli-ipv6 [2]:

This package is moot: long out of date, and the patches have already
been incorporated into the next version which is widely available.

[1] https://aur.archlinux.org/account/pemb/
[2] https://aur.archlinux.org/pkgbase/transmission-cli-ipv6/