net: No longer send local address in addrMe

After bitcoin#8594 the addrFrom sent by a node is not used anymore at all,
so don't bother sending it.

Also mitigates the privacy issue in (bitcoin#8616). It doesn't completely solve
the issue as GetLocalAddress is also called in AdvertiseLocal, but at
least when advertising addresses it stands out less as *our* address.

src/net.cpp

@@ -448,7 +448,7 @@ void CNode::PushVersion()
 {
     int64_t nTime = (fInbound ? GetAdjustedTime() : GetTime());
     CAddress addrYou = (addr.IsRoutable() && !IsProxy(addr) ? addr : CAddress(CService(), addr.nServices));
-    CAddress addrMe = GetLocalAddress(&addr, nLocalServices);
+    CAddress addrMe = CAddress(CService(), nLocalServices);
     if (fLogIPs)
         LogPrint("net", "send version message: version %d, blocks=%d, us=%s, them=%s, peer=%d\n", PROTOCOL_VERSION, nMyStartingHeight, addrMe.ToString(), addrYou.ToString(), id);
     else