For software that interfaces with Bitcoin Core via RPC, it can be useful to know whether the fRelayTxes flag is set. It could be added to `getnetworkinfo`.

{
        try
        {
            BeginMessage(pszCommand);
            EndMessage(pszCommand);
        }
        catch (...)
        {
            AbortMessage();
            throw;
        }
    }
    template<typename T1>
    void PushMessage(const char* pszCommand, const T1& a1)
    {
        try
        {
            BeginMessage(pszCommand);
            ssSend << a1;
            EndMessage(pszCommand);
        }
        catch (...)
        {
            AbortMessage();
            throw;
        }
    }
    template<typename T1, typename T2>
    void PushMessage(const char* pszCommand, const T1& a1, const T2& a2)