Ensure chutney relays can exit to localhost IPv4 and IPv6
Keep up to date with changes in the latest tor versions, where localhost
exits are blocked by default, even in TestingTorNetworks.
relay.tmpl: permit exits to IPv4 and IPv6 (tor versions without the
torrc IPv6 options will benefit from the changes in
relay-exit-v4-only.tmpl, relay-exit-v6-only.tmpl, relay-non-exit.tmpl:
exit-v4.i, exit-v6.i: include files containing the exit lines for IPv4