message: Drop us=... message in net debug for sending version message
  The us=... message in the debug log when sending a version message is
  always [::]:0, because we no longer send our own address there.
  Therefore, this information is entirely redundant. Remove it.
diff: @@ -1112,9 +1112,9 @@ void PeerManagerImpl::PushNodeVersion(CNode& pnode, int64_t nTime)
  nonce, strSubVersion, nNodeStartingHeight, tx_relay));
  if (fLogIPs) {
  - LogPrint(BCLog::NET, "send version message: version %d, blocks=%d, us=%s, them=%s, txrelay=%d, peer=%d\n", PROTOCOL_VERSION, nNodeStartingHeight, CService().ToString(), addr_you.ToString(), tx_relay, nodeid);
  + LogPrint(BCLog::NET, "send version message: version %d, blocks=%d, them=%s, txrelay=%d, peer=%d\n", PROTOCOL_VERSION, nNodeStartingHeight, addr_you.ToString(), tx_relay, nodeid);
  } else {
  - LogPrint(BCLog::NET, "send version message: version %d, blocks=%d, us=%s, txrelay=%d, peer=%d\n", PROTOCOL_VERSION, nNodeStartingHeight, CService().ToString(), tx_relay, nodeid);
  + LogPrint(BCLog::NET, "send version message: version %d, blocks=%d, txrelay=%d, peer=%d\n", PROTOCOL_VERSION, nNodeStartingHeight, tx_relay, nodeid);
  }
  }
  