bitcoin

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fanquake 2fa60f0b68 Merge bitcoin/bitcoin#27452 : test: cover addrv2 anchors by adding TorV3 to CAddress in messages.py

ba8ab4fc54 test: cover addrv2 support in anchors.dat with a TorV3 address (Matthew Zipkin)
b4bee4bbf4 test: add keep_alive option to socks5 proxy in test_framework (Matthew Zipkin)
5aaf988ccc test: cover TorV3 address in p2p_addrv2_relay (Matthew Zipkin)
80f64a3d40 test: add support for all networks in CAddress in messages.py (brunoerg)

Pull request description:

  Closes https://github.com/bitcoin/bitcoin/issues/27140

  Adds test coverage for https://github.com/bitcoin/bitcoin/pull/20516 to ensure that https://github.com/bitcoin/bitcoin/issues/20511 is completed and may be closed.

  This PR adds a test case to `feature_anchors.py` where an onion v3 address is set as a blocks-only relay peer and then shutdown, ensuring that the address is saved to anchors.dat in addrv2 format. We then ensure that bitcoin attempts to reconnect to that anchor address on restart.

  To compute the addrv2 serialization of the onion v3 address, I added logic to `CAddress` in `messages.py`. This new logic is covered by extending `p2p_addrv2_relay.py` to include an onion v3 address. Future work will be adding coverage for ipv6, torv2 and cjdns in these modules and also `feature_proxy.py`

  Also includes de/serialization unit test for `CAddress` in test framework.

ACKs for top commit:
  jonatack:
    ACK ba8ab4fc54
  brunoerg:
    crACK ba8ab4fc54
  willcl-ark:
    ACK ba8ab4fc54

Tree-SHA512: 7220e30d7cb975903d9ac575a7215a08e8f784c24c5741561affcbde12fb92cbf8704cb42e66494b788ba6ed4bb255fb0cc327e4f2190fae50c0ed9f336c0ff0