Warning about preferred bridge address lies
When the ClientUseIPv6 option was added (commit e04e1a2e) the logic for what a preferred OR port is changed. The warning about which OR port is prefered rewrite_node_address_for_bridge() now may say confusing things like "Will prefer IPv6 port" and then print an IPv4 port.
The address is correct. The address family, "IPv4" or "IPv6" may be wrong.
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