Warn when ReachableAddresses restricts connections to relays chosen by others
Tor clients which use one-hop paths to access relays chosen by other clients can't use ReachableAddresses (or similar options) or ClientUseIPv4 0 (#17840 (moved)). If they did, this would deny them access to some relays, potentially impairing functionality or performance.
This affects the following Tor modes:
- Tor2Web - Introduction Points
- RSOS - Rendezvous Points
For directory, guard, and bridge connections, clients choose or are configured with accessible relays based on ReachableAddresses / ClientUseIPv4/ClientUseIPv6.
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