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

af3b0dfc54 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 af3b0dfc54
  jnewbery:
    utACK af3b0dfc54

Tree-SHA512: f169d7b4f07c219e541f7c37ea23b82c77e50085fc72ec62f1dd46970389916e177268d07d45c7be94dd209d1903f8f23eaff62b7fa782f6057dd36bb96bba82

src/net_processing.cpp

@@ -498,7 +498,9 @@ static void PushNodeVersion(CNode& pnode, CConnman& connman, int64_t nTime)
     NodeId nodeid = pnode.GetId();
     CAddress addr = pnode.addr;
 
-    CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService(), addr.nServices));
+    CAddress addrYou = addr.IsRoutable() && !IsProxy(addr) && addr.IsAddrV1Compatible() ?
+                           addr :
+                           CAddress(CService(), addr.nServices);
     CAddress addrMe = CAddress(CService(), nLocalNodeServices);
 
     connman.PushMessage(&pnode, CNetMsgMaker(INIT_PROTO_VERSION).Make(NetMsgType::VERSION, PROTOCOL_VERSION, (uint64_t)nLocalNodeServices, nTime, addrYou, addrMe,