Prop 312: Clarify IPv6 ORPort Binding

Part of 33049.
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teor 2020-02-11 14:11:09 +10:00
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@ -558,6 +558,12 @@ Ticket: #33073
IP address (in a single API call). Tor should support both styles of
networking API.
In particular, if binding to all IPv6 addresses fails, relays should still
try to discover their public IPv6 address, and check the reachability of
that address. Some OSes may not support the IPV6_V6ONLY flag, but they may
instead bind to all addresses at runtime. (The tor install may also have
compile-time / runtime flag mismatches.)
If both reachability checks succeed, relays should publish their IPv4 and
IPv6 ORPorts in their descriptor.