Darius Clark

This removes the deprecated trait members and add the DialOpts to `Transport::dial` supersede #44

relay: external address not removed upon listener being closed

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### Summary When a listener tied to a relay reservation is closed, swarm doesn't emit the event indicating that the listener is closed, however the external address still persist. This...

## Description This PR allows the relay to enable and disable its advertisement of the HOP protocol, with the option to automatically determine if the relay should advertise its protocol...

## Description This PR implements a basic autorelay system that would automatically make reservation as soon as it is discovered that the connected node supports HOP protocol. resolves #4651. ##...