net: attempt v2 transport for addrfetch connections if we support it

Author: mzumsande

src/net.cpp

@@ -2322,10 +2322,13 @@ void CConnman::ProcessAddrFetch()
         strDest = m_addr_fetches.front();
         m_addr_fetches.pop_front();
     }
+    // Attempt v2 connection if we support v2 - we'll reconnect with v1 if our
+    // peer doesn't support it or immediately disconnects us for another reason.
+    const bool use_v2transport(GetLocalServices() & NODE_P2P_V2);
     CAddress addr;
     CSemaphoreGrant grant(*semOutbound, /*fTry=*/true);
     if (grant) {
-        OpenNetworkConnection(addr, false, std::move(grant), strDest.c_str(), ConnectionType::ADDR_FETCH, /*use_v2transport=*/false);
+        OpenNetworkConnection(addr, false, std::move(grant), strDest.c_str(), ConnectionType::ADDR_FETCH, use_v2transport);
     }
 }