Merge #20212: net: fix output of peer address in version message

af3b0dfc5463c42fb9bff39f020fc1728ed44bc7 net: fix output of peer address in version message (Vasil Dimov)

Pull request description:

  If `-logips -debug=net` is specified then we print the contents of the
  version message we send to the peer, including his address. Because the
  addresses in the version message use pre-BIP155 encoding they cannot
  represent a Tor v3 address and we would actually send 16 `0`s instead (a
  dummy IPv6 address). However we would print the full address in the log
  message. Before this fix:

  ```
  2020-10-21T12:24:17Z send version message: version 70016, blocks=653500, us=[::]:0, them=xwjtp3mj427zdp4tljiiivg2l5ijfvmt5lcsfaygtpp6cw254kykvpyd.onion:8333, peer=0
  ```

  This is confusing because we pretend to send one thing while we actually
  send another. Adjust the printout to reflect what we are sending. After
  this fix:

  ```
  2020-10-21T12:26:54Z send version message: version 70016, blocks=653500, us=[::]:0, them=[::]:0, peer=0
  ```

ACKs for top commit:
  MarcoFalke:
    review ACK af3b0dfc5463c42fb9bff39f020fc1728ed44bc7
  jnewbery:
    utACK af3b0dfc5463c42fb9bff39f020fc1728ed44bc7

Tree-SHA512: f169d7b4f07c219e541f7c37ea23b82c77e50085fc72ec62f1dd46970389916e177268d07d45c7be94dd209d1903f8f23eaff62b7fa782f6057dd36bb96bba82

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