Make sure IPv6 ORPorts are configured

Our exit-v6.tmpl should always have a v6 ORPort.

Furthermore, bridges+ipv6-min network configuration now uses v6
authorities and a v6 Exit. Without this, the IPv6 bridge self
rechability test would never work.

Closes #40007

Signed-off-by: David Goulet <dgoulet@torproject.org>

networks/bridges+ipv6-min

 Require("IPV6")
 # By default, Authorities are not configured as exits
-Authority = Node(tag="a", authority=1, relay=1, torrc="authority.tmpl")
-ExitRelay = Node(tag="r", relay=1, exit=1, torrc="relay.tmpl")
+Authority = Node(tag="a", authority=1, relay=1, ipv6_addr="[::1]",
+                 torrc="authority-orport-v6.tmpl")
+ExitRelay = Node(tag="r", relay=1, exit=1, ipv6_addr="[::1]",
+                 torrc="relay.tmpl")
 
 BridgeAuthority = Node(tag="ba", authority=1, bridgeauthority=1,
                        relay=1, torrc="bridgeauthority.tmpl")

torrc_templates/exit-v6.i

+${include:orport-v6.i}
+
 # Must be included after relay-non-exit.tmpl
 ExitRelay 1