Security: Use canonical SocketAddrs to avoid duplicate peer connections, Feature: Send local listener to peers

[teor2345]

Motivation

1. Zebra's seed peers and local listener address can be non-canonical, leading to duplicate peer connections.

2. In PR Security: stop gossiping failure and attempt times as last_seen times #2273, Zebra stopped gossiping its local listener address to peers, because it didn't have a last seen time.

3. In PR Security: stop gossiping failure and attempt times as last_seen times #2273, Zebra applied its local listener to any existing entry for that address, which could skip the listener, or leak internal state.

4. Since the listener was added to the cloned AddressBook, it was briefly included in the address book metrics.

These changes help test PRs #2273 and #2275.

Specifications

addr.time:

Nodes advertising their own IP address set this to the current time.

https://developer.bitcoin.org/reference/p2p_networking.html#addr

Solution

1. Make Zebra always use canonical seed, listener, MetaAddr, and MetaAddrChange SocketAddrs
2. Give the local listener address a last seen time
3. Replace any existing address book entry for the local listener
4. Get the peer list from the address book, rather than cloning it

As a side-effect, this change also makes sanitization slightly faster, because it avoids some useless peer filtering and sorting.

Testing

Adds proptests for the following properties:

• regardless of any existing entry for a local listener MetaAddr, a sanitized address book contains a copy of the local listener with the current time
  • but listeners that are not valid for outbound connections should be skipped
• Zebra doesn't share invalid listeners (IP addresses or client services) with its peers

Review

@jvff can review this change.

Reviewer Checklist

• Code implements Specs and Designs
• Tests for Expected Behaviour
• Tests for Errors

Follow Up

Make MetaAddr.addr a private field #2357, so the constructors can make sure it's canonical

[jvff]

Looking good! I added some minor suggestions, but they're all optional.