p2p, bugfix: detect addnode cjdns peers in GetAddedNodeInfo()

Addnode (manual) peers connected to us via the cjdns network are currently not
detected by CConnman::GetAddedNodeInfo(), i.e. fConnected is always false.

This causes the following issues:

- RPC `getaddednodeinfo` incorrectly shows them as not connected

- CConnman::ThreadOpenAddedConnections() continually retries to connect them

src/net.cpp

@@ -2832,7 +2832,7 @@ std::vector<AddedNodeInfo> CConnman::GetAddedNodeInfo(bool include_connected) co
     }
 
     for (const auto& addr : lAddresses) {
-        CService service(LookupNumeric(addr.m_added_node, GetDefaultPort(addr.m_added_node)));
+        CService service{MaybeFlipIPv6toCJDNS(LookupNumeric(addr.m_added_node, GetDefaultPort(addr.m_added_node)))};
         AddedNodeInfo addedNode{addr, CService(), false, false};
         if (service.IsValid()) {
             // strAddNode is an IP:port