For every peer expose through `getpeerinfo` RPC whether or not we selected them as HB peers, and whether or not they selected us as HB peers.

Suggestion by @gmaxwell.
CNetAddr local;
                local.SetInternal("fixedseeds");
                addrman.Add(convertSeed6(Params().FixedSeeds()), local);
                done = true;
            }
        }
        
        
        
        CAddress addrConnect;
        
        int nOutboundFullRelay = 0;
        int nOutboundBlockRelay = 0;
        std::set<std::vector<unsigned char> > setConnected;
        {
            LOCK(cs_vNodes);
            for (const CNode* pnode : vNodes) {
                if (pnode->IsFullOutboundConn()) nOutboundFullRelay++;
                if (pnode->IsBlockOnlyConn()) nOutboundBlockRelay++;
                
                
                
                
                
                switch (pnode->m_conn_type) {
                    case ConnectionType::INBOUND:
                    case ConnectionType::MANUAL:
                        break;
                    case ConnectionType::OUTBOUND_FULL_RELAY:
                    case ConnectionType::BLOCK_RELAY: