Add helper function to convert target IPv6 socket address structure
to host format, handling all sockaddr_in6 fields including address,
port, flow info, and scope ID.
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Reviewed-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
Signed-off-by: Warner Losh <imp@bsdimp.com>